When you have a very thin (metal) sheet of Alclad e.g. 0.040" and you want to place a standard countersunk head rivet in a hole in that material, MIL-STD-403 suggests dimpling around the hole instead of countersinking, which otherwise has the effect of reducing material thickness. This dimpling is usually achieved with a dimple die set in a press or using hand pliers. The characteristic form is similar to a countersunk hole except that the metal is pushed out on the opposite side of the material and the entry to the dimple is a curved surface.
What would be the best way to do this in the model space in CorelCAD?
[PS In turbocad, you have an Imprint tool that performs this function.]