Is there a way to make the items in a PopupGalleryTool layout vertically?
1 52 63 74
instead of horizontally
1 23 45 67
progression,
The only way to accomplish this would be to change the order in which the items were added; there is no property that will change the orientation of the layout from horizontal to vertical. If you would like to submit a feature request for this functionality, you can do so here.
~Kim~