Can you change the canvas color when editing a group? It turns to the off-yellow and it's very hard to see light colors.
Just to clarify, I'm not talking about the standard canvas (Revit > Options > Invert Background).
Nope. That's definitely a 'wishlist item' of mine - it really should obey the "Invert Background" setting under Options. This often makes things difficult - we have several elements with yellow or otherwise very lightly-colored lines.
As a quick workaround, I just made a filter (in my case, for ducts & associated accessories). Then I just override the color to black when I'm editing the group.
If you would like this functionality to change, this link is setup for you to submit feature requests, or feedback, directly to our Development group.
I encourage you to use the feedback link as our Development group is always interested and would like to hear your feedback directly, since you are better suited to state the business case for a feature request.