Thermwood / eCabinet Systems

Can anyone tell me how to place a sink on a cabinet. Everytime i try i have the counter top going right through the sink bowls so all i can see is the upper rim of the sink. Thank you.

Thank yall very much! I actually figured it out about 10 minutes after i posted that but thank you very much for the responses anyway!

Some assemblies that i make need to go up on the wall and not down on the floor. But everytime I go to place them in a room it automatically sets it on the floor. Does anyone know how to place them up on a wall?
Thank you