Planet Technology IDL-2402 - Manual (Page 209)

Getting help
The user can get help in two ways.
The first is by using the help command. The user can also enter a question mark ‘?’ at
each position in the command. The displayed result depends on the execution mode and
previous input.
Terminal Key Function
Following is the list of all the terminal keys and their function.
Table 5-1 List of Terminal Keys
TAB Attempt to perform completion on the text before point
TAB TAB Display the next keyword of this command
? Display help of command
ENTER Execute input
DEL or BACKSPACE Delete the character to the left of the cursor
UP Arrow History of last input line
DOWN Arrow History of previous input Line
CTRL-d
Delete the character at point. If point is at the beginning of the
line, there are no characters in the line, and the last character
typed was not bound to delete-char, then return EOF.
CTRL-a Move to the start of the line
CTRL-e Move to the end of the line
CTRL-f Move Forward one character
CTRL-b Move Back one character
CTRL-c Force to interrupt
CTRL-k Kill the text from the current cursor to the end
CTRL-p
Move ‘back’ through the history list, fetching the previous
command.
CTRL-n
Move ‘forward’ through the history list, fetching the next
command.
CTRL-r
Search backward starting at the current line and moving ‘up’
through the history as necessary. This is an incremental search.
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