I have an object in edit mode. I select multiple vertices. I want to set all of their x positions to the same global position at the same time. The "Transform" panel seems to automatically change into a "Median" mode when multiple vertices are selected, so the operation won't move the vertices to the same global position (instead, the Median).
I read on another post that holding down the Alt key before hitting the Enter key (after setting a value in the X box) should apply the position value to all vertices, but this doesn't work. I'm on a Mac, maybe the modifier key is different.