You can add useful information, such as to-dos, bug-fix reminders, and section headings to the jump bar symbol pop-up menu by annotating your code in the source editor.
Add a to-do item: Insert a comment with the prefix TODO:—for example: // TODO: [your to-do item].
Add a bug fix reminder: Insert a comment with the prefix FIXME:—for example: // FIXME: [your bug fix reminder].
Add a heading: Insert a comment with the prefix MARK:—for example: // MARK: [your section heading]. A heading will also appear in the minimap.
Add a separator line: To add a separator above, add a hyphen (-) before the comment portion of an annotation—for example: // MARK: - [your content]. To add a separator below, add a hyphen (-) after the comment portion of the annotation—for example: // MARK: [your content] -.