Planet Technology IDL-2402 - Manual (Page 210)

CTRL-t
Drag the character before the cursor forward over the character
at the cursor, moving the cursor forward as well. If the insertion
point is at the end of the line, this transposes the last two
characters of the line. Negative arguments have no effect.
CTRL-u Kill backward from the cursor to the beginning of the current line.
CTRL-w
Kill the word behind point, using white space as a word
boundary. The killed text is saved on the kill-ring.
CTRL-y Yank the top of the kill ring into the buffer at point.
CTRL-s Terminal will not response to what the operator key in
CTRL-q Back to normal mode from terminal not responding mode
CTRL-z Exit current execution mode
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