...
When you take a look at the “Add new shelf” button you will detect a small triangle. Click on it to open a submenu:
[ Image: screenshot ]
Add new shelf
This entry has exactly the same functionality as the same-named main button.
Add built-in shelf
Here you can choose from RealFlow's default shelves and add another instance of the selected shelf. This can be interesting if you want to modify a system shelf and your own commands, but keep the original version as well. Another occasion where you need this function is when you have deleted a system shelf and want to bring it back to the user interface.
...
Adds a 1:1 copy of the currently selected shelf.
Remove selected shelves
Delete a shelf. This action has to be confirmed.
...
If you click on an empty space somewhere in the “Shelves” area you will see this menu:
[ Image ]
The entries of this menu have the same functionality as their same-named button counterparts.
...