Accessibility preference page
You can change the following preferences on the
Use custom caret
||Replaces the original caret (the marker that indicates where the next character will appear)
with a custom caret and shows a different caret for Overwrite and Insert modes.
Enable thick caret
||Replaces the original caret with a more visible, thicker caret.
Use characters to show changes on line number bar
||Quick Diff shows the changes in a vertical ruler using colors.
Color-blind persons can enable this option to show differences with different characters
in the line number ruler.
The Accessibility preference page: