The Wx3270 APL pop-up keypad window appears then the keypad button is pressed on the wx3270 main window, while the Alt key is pressed. It allows common APL keys to be input quickly, when the key mappings may not be memorized or may not exist at all.
To enter one of the keys, left-click on it. To enter one of the keys and close the window, right-click on a key.
Some keys have a different meanings when modifier keys (Shift, Alt, Ctrl) are pressed. For example, the key labeled ÷ becomes ⌹ when Shift is pressed. The key labels change as modifier keys are pressed and released.
The workstation keyboard is still active while the keypad window has focus, so the keypad can be left open without interfering with ordinary keyboard input. That is, it is not necessary to click on the main window again to continue typing.
The keymap can be customized from the keypad settings tab.