diff --git a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_11_0.png b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_11_0.png
index 03042b8..3c93bb7 100644
Binary files a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_11_0.png and b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_11_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_13_0.png b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_13_0.png
index 03042b8..3c93bb7 100644
Binary files a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_13_0.png and b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_13_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_15_0.png b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_15_0.png
index 97e457b..c8edfb1 100644
Binary files a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_15_0.png and b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_15_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_17_0.png b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_17_0.png
index 03042b8..3c93bb7 100644
Binary files a/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_17_0.png and b/markdown/chapter_1_introduction/tutorial_0_visualization_files/tutorial_0_visualization_17_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_15_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_15_0.png
index a51d3a4..2cfb8de 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_15_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_15_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_19_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_19_0.png
index 6524496..0f52316 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_19_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_19_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_29_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_29_0.png
index d8d2c2c..e574b08 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_29_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_29_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_33_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_33_0.png
index 1047fe1..97063c6 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_33_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_33_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_37_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_37_0.png
index c894ac5..cee0e9c 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_37_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_37_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_43_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_43_0.png
index 5945e1e..c3959ce 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_43_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_43_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_45_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_45_0.png
index 1578cbc..2c59e65 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_45_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_45_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_49_1.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_49_1.png
index 351e52b..03cd4ae 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_49_1.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_49_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_51_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_51_0.png
index 1c45883..d1b36a1 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_51_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_51_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_53_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_53_0.png
index 0acaae2..4557523 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_53_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_53_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_55_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_55_0.png
index ae02510..459fcc1 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_55_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_55_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_57_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_57_0.png
index c4da721..f976200 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_57_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_57_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_5_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_5_0.png
index 8487778..8ad62e6 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_5_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_5_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_63_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_63_0.png
index 394fd23..f8b4d0f 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_63_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_63_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_65_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_65_0.png
index 140ae5b..e611e74 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_65_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_65_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_67_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_67_0.png
index 29c3a75..eea6616 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_67_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_67_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_71_0.png b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_71_0.png
index 9ca518c..b7acf10 100644
Binary files a/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_71_0.png and b/markdown/chapter_1_introduction/tutorial_1_grids_and_galaxies_files/tutorial_1_grids_and_galaxies_71_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_11_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_11_0.png
index eb6a698..623e4f0 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_11_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_11_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_13_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_13_0.png
index 509d47d..067d8ce 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_13_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_13_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_0.png
index 6106735..da4f83e 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_1.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_1.png
index 0721ecf..d27c826 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_1.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_17_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_21_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_21_0.png
index d8848aa..192d20e 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_21_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_21_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_23_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_23_0.png
index 233b56f..db22876 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_23_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_23_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_0.png
index 1f9ee35..2c8b67d 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_1.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_1.png
index a7b745b..47ae004 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_1.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_25_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_29_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_29_0.png
index 861f704..d265a5f 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_29_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_29_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_31_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_31_0.png
index 10f1d4f..7f7350c 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_31_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_31_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_33_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_33_0.png
index 69f69cd..0a6c706 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_33_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_33_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_35_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_35_0.png
index f3ca13f..24aa117 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_35_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_35_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_37_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_37_0.png
index 7600a53..d55eeff 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_37_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_37_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_7_0.png b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_7_0.png
index 1a4e5fa..2892f41 100644
Binary files a/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_7_0.png and b/markdown/chapter_1_introduction/tutorial_2_data_files/tutorial_2_data_7_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_11_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_11_0.png
index a02ecce..64e5943 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_11_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_11_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_15_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_15_0.png
index cace531..0b9cf8a 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_15_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_15_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_27_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_27_0.png
index e84c182..ff4b0ec 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_27_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_27_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_29_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_29_0.png
index ff2a534..667a365 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_29_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_29_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_33_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_33_0.png
index 4471f32..4d639ce 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_33_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_33_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_37_2.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_37_2.png
index e0ed78b..221c7e7 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_37_2.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_37_2.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_0.png
index f34457a..9758e3b 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_1.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_1.png
index e0ed78b..221c7e7 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_1.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_39_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_41_1.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_41_1.png
index d071171..1de9bed 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_41_1.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_41_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_43_1.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_43_1.png
index a739035..dc3c4f3 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_43_1.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_43_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_45_1.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_45_1.png
index 5d79446..8306db9 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_45_1.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_45_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_55_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_55_0.png
index 2584617..9a1b2d3 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_55_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_55_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_59_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_59_0.png
index a812859..6f16bb0 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_59_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_59_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_63_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_63_0.png
index 3a5ec6b..426b461 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_63_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_63_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_67_1.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_67_1.png
index 20ba32a..1814f8c 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_67_1.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_67_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_69_0.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_69_0.png
index f5218f2..ed694df 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_69_0.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_69_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_7_1.png b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_7_1.png
index b429b56..b0373fd 100644
Binary files a/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_7_1.png and b/markdown/chapter_1_introduction/tutorial_3_fitting_files/tutorial_3_fitting_7_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_11_0.png b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_11_0.png
index f862579..718eeb1 100644
Binary files a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_11_0.png and b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_11_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_0.png b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_0.png
index 678e22d..2ff25e6 100644
Binary files a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_0.png and b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_1.png b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_1.png
index 7338c92..96d1772 100644
Binary files a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_1.png and b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_7_1.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_0.png b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_0.png
index f862579..718eeb1 100644
Binary files a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_0.png and b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_0.png differ
diff --git a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_1.png b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_1.png
index fa0c645..6870fd5 100644
Binary files a/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_1.png and b/markdown/chapter_1_introduction/tutorial_5_summary_files/tutorial_5_summary_9_1.png differ