When creating kits of the same type, it is convenient to use the cloning function (creating an exact copy) of a kit, making only single changes to previously created kits.
To clone a kit:
Select the kit you want to copy;
Use the main menu item "Edit" - "Clone document";
In the cloned kit window, make the necessary changes;
Save the new set (the main menu item "Document" - "Save document" or the button on the toolbar).
You cannot copy the composition of one set to the composition of another set.