Widening access hole on 3Shape

[jlasaoms]

I've been trying to find the answer to this but I'm stumped. I'm new to making implant crowns and I'm making temporaries at the moment. When I print them, the ti base does not fit the crown as it's too tight. Widening the access hole with a bur gets rid of that edge that makes it seat correctly on an engaging ti base. I have looked everywhere to find out how to widen the hole while digitally designing but I can't find it.

Help? I'm working on 2019 version of 3shape.

Thank you!
Jennifer