With the Level Dimensions in ARCHICAD 19, the gravity function has been integrated into the Level Dimension Tool.
So if you select the tool, and click on an element (eg. Roof, Slab, etc) it will automatically gravitate to that level. If there are multiple elements overlapping, you can select which one to highlight using the tab button (and you’ll see what’s selected in the Info Tag) .If you click while an element is highlighted.
Turning on the gravity tool will override the new feature and the Dimension will gravitate to what’s selected in the gravity drop-down menu.