Source Navigation

Ctrl+click on a subroutine or variable, Ctrl+shift+"O" to open selected file/module
Edit -> Go to Line or Ctrl+G Goto specific line
Edit -> Brace Matching or Ctrl+1 Jump to matching brace
Window -> Last visited File or Ctrl+Tab (jump back and forth between two files also Ctlr-P ???)
Window -> Oldest visited file or Shift+Ctrl+Tab Previous Pane ???