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Jeremiah Shore
31,168 Pointsunable to change guideline mode in Android Studio
Seems to be a UI bug in Android Studio; I'm currently on version 3.2.1. Just wanted to share this out in case anyone had the same issue...
When I add guidelines, I'm not able to toggle their mode at first. Switching to the XML view (text) tab and back fixes this for me.
2 Answers

Stephen Wall
Courses Plus Student 27,294 PointsYou can click on the guideline header to change its mode from: left, right, percentage.

Stephen Sysak
2,025 PointsYou can change the XML file to say:
app:layout_constraintGuide_percent="0.33"
rather than constraintGuide_begin