Missing Slab Option in Design Command

I am attempting to design concrete slabs, using plate elements. Under the Analytical Modeling - 'Design' Tab, I am attempting to select 'DESIGN SLAB/ELEMENT' under the Design commands prompt. However, this option is missing. I only have options for 'DESIGN BEAM', 'DESING COLUMN', AND 'TAKE OFF'. I am following a tutorial which uses an older version of staad pro. Should this slab option still be present in this version, or has it been relocated?