lazarus/examples/SynEdit/SynGutterMarks
..
README.txt
SynGutterMarkExample.ico
SynGutterMarkExample.lpi
SynGutterMarkExample.lpr
SynGutterMarkExample.res
unit1.lfm
unit1.pas

Example for SynEdit's Bookmarks
(SynEdit is the editor used by the IDE)

This example shows how to display Bookmarks and other marks/icons in the gutter of the editor.

The gutter is the area on the left side of the editor, which also shows the line numbers.
It can display small icons, such as bookmarks or the breakpoint-symbols used by the IDE.