Can't change, move or delete slab in model

[jessicaBWP2S]

Hi

I would like to change the thickness of this layer in blue, but I am unable to change anything of this slab. It is not pinned and I tried using the central model to change it. There is no error message that appears, it just loads and nothing happens.

Thank you

Jessica

[jay_colcombe]

Is it on a Workset that is locked or you are not the owner of?

Is it in a Linked model?

Are you using Revit LT?

If you select if what does it say in the Properties Palette, this should give you more information on what is going on and would help as a guide to the reader!