Copy & paste branches
Sometimes copying branches is really useful: maybe to copy a template for editing, or to move a branch from one diagram to another.
To copy a branch right click on an item, then choose the copy option from the menu. To paste, right click on the background of the diagram where you want the item to be pasted, then choose the paste icon from the menu. The pasted branch will be connected to the closest item to the place it is pasted.
You can copy and paste between diagrams within the same browser window (even between different tabs).