Many ways of doing it :

• To create a Monk, Hit the red '+', this will oprn this window :

Here you can add the selected Monk BELOW the one that is selected in the main UI.

If you choose options with it, they'r will be created as well.

• You can also RMD on the same button :

In this case, it will created without any options.

• You can also have the same menu from RMB in the main UI :