Document Sub-Types can be created, edited and deleted from here. Use drop-down box to select doucment and view its existing Sub-Types.
Create Sub-Types
To create new Sub-Type, click 
. Fill in Name and state if needs to be enabled or disabled then click 
to save.
Edit Sub-Types
Sub-Types can be edited by clikcing the 
button. Complete necessary changes then click 
to save changes.
Delete Sub-Types
Sub-Types can be deleted by clicking the 
button on the right.