euhm use alt + drag metrics :) to apply the change to all layers... both in glyph view as in a space center HAHAHA, thanks!!! Of course, I had no idea about that. Damn, I love it, I already made a sophisticated observer system, which checks which space center is being used, activates Glyph.LeftMarginDidChange etc, etc… At least now I'm also able to use normal step-by-step spacing for all of the layers :D, not only dragging

the problem was indeed in the oneToThree extension (now renamed to 1To3). please uninstall the extension, and install the latest version. things should work fine again.

As always, thanks a lot for your fast reply and taking this under consideration. jo