I think the Z-Axis popup has the macros to perform an auto-z already assigned to a button.
I think a forum-based wiki could support this.
Edit: @madgrizzle’s comment and mine were simultaneous.
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Or a wiki somewhere…
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The z-axis pop up has the button defined, but no accompanying action.
I don’t understand what you mean… are you saying its a dummy button?
It’s an opportunity for a PR contribution 
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There seems to be code there already… that’s why I ask. It issues a “G38.2 Z-.2 F2” command…
See groundcontrol.kv, line 641… 
Ok, you made me go back and read other posts.
So, it’s greyed out to avoid confusing people that might try to use it even though they aren’t setup to do so or is it for some other reason? If the former, how about we add a setting where you can enable Auto-Z Axis (with a description saying that you need to have it configured and where to go to read about it… can kivy include hyperlinks?). If the user enables it, then the button becomes enabled.
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That’s the concern - to avoid a z-axis command which could trigger motion that might damage the mechanism if used without proper preparation.
Reviewing GC PR#631 I see the metric case is wrong, the decimal point needs to be moved in line 145 of zAxisPopupContent.py so that the move is 5mm instead of 0.5mm.
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It’s an opportunity for a PR contribution :)
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Sorry, i just noticed the new category now.