How to save changes when im in client mode

so you know how when you play test in studio and you can change to edit mode while your character is still standing in your game
how would i make it so that the changes you made will save when you stop the playtest?

If you are changing contents within a script, a pop-up asking you if the changes made in the playtest should be applied, when you stop the playtest.

If its instances, the studio will not ask you if you want to keep the changes made in the playtest. However, we can copy instances from the playtest (using the explorer during playtest), and then paste them into the workspace after the playtest, but this is not truly applying changes from the playtest into the workspace.