Dear Hongyi,
you wrote
> 1. I try to query the built-in help with the following command, but
> obtained so many entries I don't know how to choose from:
>
> gap> ?Comm
> Choose an entry to view, 'q' for none (or use ?<nr> later):
>
> │
> │[1] Guarana (not loaded): Comm
>
> │
> │[2] Utils: Comm
>
> │
> │[3] ANUPQ (not loaded): Commands from the Main p-Quotient menu
> [...]
In this situation, the GAP help system uses a pager
that is apparently not as intuitive as it was intended.
One entry is selected,
you can move the selection up/down in the list of choices
via the up/down arrow keys,
and you can show the help for the selected entry by hitting the <Return> key.
Entering 'q' takes you back to the GAP prompt.
> 2. I also tried with the same method to check the following two commands:
>
> gap> ?quit
> gap> ?QUIT
>
> Gap gives exactly the same document for them:
>
> > `quit'{quit}
> This closes all windows and just brings you back to the GAP
> window. In a new start of ITC all switches will be set to their
> default values.
> The group that you had handled will still be available as a GAP object.
This is a bit surprising.
The text in question belongs to the help about 'quit'
from the GAP package ITC;
the list of choices should contain also entries for 'quit'
from the GAP Tutorial and for 'QUIT' from the Reference Manual.
All the best
Thomas
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