The TUI provides a SingleKey mode in which it installs a particular key binding in the readline keymaps to connect single keys to some gdb commands.
continue
down
finish
next
exit the SingleKey mode.
run
step
up
info locals
where
Other keys temporarily switch to the gdb command prompt.
The key that was pressed is inserted in the editing buffer so that
it is possible to type most gdb commands without interaction
with the TUI SingleKey mode. Once the command is entered the TUI
SingleKey mode is restored. The only way to permanently leave
this mode is by hitting