How can I round the corners

Hello,

I’ve been using Shapr3D for a few days, and I’ve run into a problem I can’t solve on my own, so I need your help.

I used the left and right shapes to create holes in my model (there might be an easier way, but I’m still a beginner). Now I’m having trouble rounding the corners and moving the edges. Also, as a beginner, I ended up with too many lines in my model, which makes it not as smooth as I’d like. Is there a way to remove some of these lines?

Thank You in advance and best regards from Germany,
Kamil

As a new user, I can only upload one photo. Here’s the second one showing the lines.

The additional lines are there because the two sides of the cut-out are not tangent to one another. If you don’t want those lines, use the tangent constraint where the two arcs meet when you sketch the shape you use as the cut-out. Unfortunately, I don’t know of a way to remove those lines after the cut has been made. I would alter the sketch that you used to create the cut-outs and then extrude them again and subtract it from the base shape again.