I have alpha code of a new version of zoom.kmm which has a reset to default function.
The code is here: http://dl.dropbox.com/u/1522294/zoom.7z
The accelerator keys for the reset to default action are SHIFT + ESC. I am not really pleased with that choice, but almost everything else is already in use.
Please note that this is alpha code. I think everything works, but it will need more testing. It is supposed to work for everything except
individual images zoomed from the image view menu.
I do not know if there will be a menu item or a button for reset to default. Those choices will likely fall to the developers. Creating a button would mean more work for developers because all skins would need it. I would vote against a button.
Be sure to copy your current zoom.kmm to a secure location before putting this file in its place.
I will be traveling in February, and may not have internet access. If you have comments or find errors or can fix the errors, please address your finding to Desga2. I think he is the person who will make the call whether to include this in the next release of KM.