@ Georg - I don't think your idea is the way I'd like to see this change - to solve the problem, but thanks for suggesting it anyway.

It seems to me that it is either a change to the way the iMac Brightness setting is currently functioning or a change to PageStream that bypasses the iMac Brightness Setting of F1/F2 keys by using alternative Function keys.

For me, as I am so familiar with using PageStream, and that the iMac Brightness setting is so much more recent I would hope the key allocation in MorphOS could be modified to use a keyboard key modifier, like Control, Alt-Option or Command or use less likely to be used Function Keys like F11 and F12?