ZTERM 2000 accepts all standard Windows key combinations like Alt-F4 to close a window or program. In addition, ZTERM 2000 also supports:
Control-Shift-Enter: This key combination unlocks the keyboard if it has been locked.
Alt-Enter: Toggles ZTERM 2000 between full-screen and and normal window operation.
Tapping Alt: If ZTERM 2000 is running full-screen, tapping the Alt key (i.e. pressing it and releasing it with no other key presses) will switch to the next instance of ZTERM 2000. Tapping the left Alt key toggles between the instances one way and the right Alt toggles the opposite direction.