I've just bought the ARP2600V, and also own the Mg Modular V. Both of them allow you to resize (expand downwards) the window, ONE CLICK AT A TIME on the little Plus and Minus buttons. It makes my arm fall off!
Wouldn't it be better to offer a normal window resizing option, like on every window in every application on both Mac and PC? Hopefully in the updates that are on their way.
Oh, also. Undo? Computer software with an undo function - a magic combination since 1987.