I have not looked at dimensions for many years. In the past I was able to rotate and extrude forms to make original objects. Is this capability still available, and if so how do I access this?
You can;t extrude object Directly in Dimension. You can Move, Rotate and Scale object. But if you are familiar with Ps or other 3D app you can create your object there and import into Dn for finishing project.
this is Adobe Dimension... Dimensions was a different [& long dead] product mate