Unable to edit the slab thickness,box grayed out...

[Anonymous]

Slab default settings dialogue box in the geometry and positioning tab.
I'm not able to change the slab thickness.It is already fixed at 30cm and grayed out.
I had no drawing problems before,if so I'll solve it from the help page.
Thanks for your help.
Using AC 10.win xp pro sp3.

[Richard Morrison]

The slab is set to a COMPOSITE cut fill. This is always static. Change to a standard cut fill and all will be good.

[Anonymous]

perfect,and thanks.