How to move a surface of a part that has fillets on its edges

I want to machining the surfaces that are red in the part by 2 mm, but because it has fillets on the edges of the part, this cannot be done with the Thickness command in catia. please help me for do this
Thanks

2 Answer

There are so many ways you could do this. One way is to Deactivate the Fillets so you can do the Thickness.

is it a flat surface?if it is, make a pocket