Hi Niels,
thanks for your answer. The programs I use where the “zoom in” is “move up” and “zoom out” is “move down” are “Corel Painter”, “Opentoonz” and “Blender”. Besides that, “Siemens Solid Edge” use the zoom like you have implemented in “Animation Paper” but, like I suggested, in the configuration you can select an option to invert the behaviour of the zoom to work with “zoom in” is “move up” and “zoom out” is “move down”. I know my english is bad but I hope you will can understand the idea in my words.
Thanks for work in Animator Paper…
Constantino