Hmmmm yup you could CTRL+ Left mouse button and drag, that selects objects in an area (and I hope you don't have too many objects because when I select many, my computer tends to lag a bit)
Then select the desired layer,
And then CTRL+SHIFT+V which means "paste in the same place".

Once objects are in your paperclip, you can of course paste them to another map.

Good luck

Oh i really forgot the most common way to copy&paste things. :D
Thank You!

Sadly there isn't a way to select everything (not that I know about). Probably for performance issues because selecting 9000+ objects would be extreme.

But the Paste In Place thing is the functionality I use the most, I think. It's really useful.

Yep i do have massive performance problems when i select about 500 objects. But also when i export my level and play it by myself i got heavy lags and low fps. I have no idea what is the cause...

Did you create it from scratch ?
Does it also happen with the normal Trine 3 ?

Yes i did.

The normal Trine 3 is totally fine. I also can play workshop levels without any perfomance loss.
Maybe it's an unresolved error.

kk

Well I guess I can't help you then :/ Better wait for a dev to pass by

Thank You anyway! :) You seem to be into this editor topic. Unfortunately i'm not good at editing and modding but i love to design levels and the Trine 2/3 editors are a perfect tool to create beautiful things. I hope the devs will fix the issues and improve the editors! :)

Do not hesitate to give your own feedbacks on the editor, possibly on this thread. And if you need general editor help you can always check the wiki[frozenbyte.com] or add me as a friend ;)

I will back later ... wait