HISTORY
outputs the list of the 19 previous commands. It is possible to use one
of these commands again, without having to type in the command again
using the history mechanism. This is similar to the history mechanism
in the UNIX C-shell, although more primitive.
To repeat the previous command, give the single character '^' as command:
ANSIG> ^
If the characters following the '^' character are not digits, then ANSIG attempts to find a previous command which starts with the same characters.
It is possible to repeat the previous command with a string substituted by another. Give the string to replace between two '^' characters, followed by the string to put in instead. An example:
ANSIG> echo old command
old command
ANSIG> ^old^new
echo new command
new command
The query item begins with a '?' character, and what follows after it is used as the prompt. The answer given by the user is put into the line instead of the '?' character and prompt text.
In tty mode, the user gives the answer directly to the prompted question via the keyboard. In graphics input mode, the user usually gives the answer by picking some item in the graphics menu window (for example a command word, or a sequence residue) or a crosspeak in the graphics window. Another possibility is to type in the answer directly from the keyboard. The text will appear in yellow after the prompt text in the graphics menu window.