Actually, it is none of these. I can no longer find any reference to it in the help manual (though it was there in previous versions and the capability to draw custom shapes is there – go to add shape on the ribbon, then lines and connectors and it is
the next-to-last one you can add)). If you add a polygon where you draw each line separately by clicking a point for each vertex, you end up with any shape you like. But I like to draw with "snap to grid" turned on, or with snapping to the edges of other
shapes. When drawing like this in the older version of PowerPoint, each point you created in your custom polygon would snap to a specific point. Now it no longer does, so your custom shape no longer fits correctly to anything else on the screen.
Once you have created a custom shape, you can right-click it (or control-click it) and a pop-up menu appears with "edit points". If you select this, you can move any individual vertex of the shape, but this also fails to follow the snapping settings you have
activated.
I just want to know how I can get these vertices to move so they follow the snap settings I have activated.