IDE Window: Editor Options Display Gutter
From Lazarus wiki
Jump to navigationJump to searchLazarus IDE has the feature called "Overview gutter". It is the thin vertical bar near the vertical scrollbar of the source editor. It can be enabled/disabled in the IDE Options dialog: "Editor / Display / Show overview gutter" checkbox.
Bar shows:
- modified lines: green/yellow
- gutter marks: breakpoints (red), bookmarks (blue), compile errors (orange)
- interface/implementation/finalization sections: shades of grey
- current visible page: shade of grey
If you click on a mark, you will go to the relevant point in the text.