You can create a branch duplicate from the current branch. Apart from the floorplan, the items are copied in this branch.

The window of duplicate branch is showed, write the new name. Press ΟΚ to create the branch.

All the branches are independent and have different parameters.

From layers manager you can choose the branch to make changes.

Finally you can save all projects in a filename for one customer or present him other option for the sema project.