TeX - Editor

Besides the editor of the primary file (window number 0) you can use up to 9 edit windows for other files. You can change between the windows by pressing Alt - number of the window, and you can transfer data with the Copy/Cut - Paste mechanism. There is only one paste buffer for all edit windows. You can copy the samples of the help into the editor. -> Hot keys -> TeXShell

Hot keys of the internal editor

F2
Save
Ctrl-F2
Save as ...
Alt-F3
Finish, close the window
Cursorkeys
Move the cursor
Shift-Cursorkeys
Mark text
Ctrl-x
Cut
Ctrl-c
Copy
Ctrl-v
Paste
Ctrl-t
Delete word
Ctrl-y
Delete line
Ctrl-w
Automatic linewrap on/off
Ctrl-q l
Goto line ...
Ctrl-q f
Search text
Ctrl-q a
Replace text
Ctrl-l
Continue search/replace
Ctrl-e
Enable/disable automatic adding of end of an environment
Ctrl-u
Undo the last delete
F1
Help for the internal editor
Ctrl-F1
Context sensitive help for current command word -> TeX - Editor