As long as you don’t need Sketches, History or Visualization, the easiest way is to isolate the box then export it in x_t format. Finally import into the other project.
If you do need the Sketches, History or Visualization, then you’ll need to export in shapr format. That will export everything regardless of being hidden or isolated.
If you are in a project view, the press and hold menu “copy” is so you can put a copy into another project folder.
.shapr format is great to use. My comment about x_t is more when you want to export a few bodies from a large project. (I was just doing that and my brain was still there .It can get “messy” if you have to delete many sketches and bodies to get what you are after in your exported file.
Deleting sketches will also delete all bodies made with those sketches. So putting sketches into a folder is a good way to get them out of sight without deleting them.
I imported my box, OK.
It came along with 2 sketches.
Will puting all sketches in the same folder make trouble,
if I want to modify the imported model?
I found myself filling some holes, etc…
then having to union everything back together again.
The main body was scrolled off, and it was annoying.
Should each model have it’s own sketches folder?
Also, is there any way to integrate all the sketches,
then explode them if needed?
No. It is really up to you. I’m sure some people keep everything very well organized and have separate folder for each model, but it isn’t necessary.
The imported items should be in the “same place” as when you exported them. They will not automatically reset to the origin.
Not sure what you mean. If you want sketches that are on parallel planes “merged” you can use the project tool but then to put them back, it could be difficult. I usually just put sketches into a folder (I name it “sketches”) and then hide the folder. Sometimes, especially if really important sketch, I will rename it.