How to create surface element set in solid meshing to apply pressure

Hi Everyone

        I am new to hyper mesh ,i am using hyper mesh as a pre processor for structural analysis . I have a solid element only,  one side i want to fix for that i have created a not set using  (Entity set >Nodes) . I want to apply pressure on other side but pressure can be applied to element set only  so how to create surface element set in solid meshing but i don't have surface elements .....

 

 

Advance thank you for fast reply

 

Warm Regard

venkat