geany - some useful shortcuts

column block selection

windows version  

  ALT+SHIFT + Mouse Left Button   or

  ALT+CTRL + Mouse Left Button

Ubuntu version

  ALT+CTRL + Mouse Left Button 

keyboard only

  ALT+SHIFT+cursor key

bookmark 

ctrl-m, ctrl-, ctrl-.

move from file to file

ctrl-pgup/pgdn, ctrl-tab

mark/unmark comment

ctrl-e

indent/unindent

ctrl-i/u

duplicate line

ctrl-d

move line up/down

alt-pgup/pgdn

goto symbol(function) definition

ctrl-T 

go back/force prev position

alt+cursor LEFT/RIGHT

goto matching brace

ctrl-b