marker_line
current line
marker_search
Search->Find...Find All->Mark
marker_mark
Search->more->Mark All
call_tips
The things that show when you type ( for a function call
white_space string_eol scalar label decorator extra entity
Those are specific to some language(s) AFAICT, you will need to see what languages produce them.
How do I make the "#include" part of a preprocessor command a different color than "<stdio.h>"
preprocessor?
what is the difference between:
number, number_1, and number_2 keyword, keyword_1, keyword_2, keyword_3, and keyword_4 identifier, identifier_1, identifier_2, identifier_3, and identifier_4 string, string_1, string_2, string_3, and string_4
Again these are specific to a particular language and depends on what the lexer assigns them to.
How do I get rid of the vertical line through the middle of the editor (shown in this picture)?
Change the preference (long line marker) in Geany prefs and/or project properties if a project is open.