How do I cut certain part of my garage without not cutting the areal perimeter walls with section tool like how Eric explains?
You put the part you want to cut into a group or component and place the section cut inside the same.
Only that, I had Eric says something like copy and past…
It depends on what certain part of which garage and what areal perimeter walls you want to cut.
Section tool is for section, copy and paste is for copy and paste. For cutting you need to cut after selection.
Finally who is Eric and how he is explained and what exactly? The “something like” usually does not work as “exactly”.
So if you tell us in a little more detail what it’s about, share some screenshots and the model you’re working on, you can also get good advice.