Most of these liners can be repositioned.
The adhesive liners are going to be more difficult to reposition, so it’s best to attempt to get it exact on the first try and make sure it is the design you want in the spot you want it. The best way to do this is to cut it out and place it without peeling off the layer over the adhesive side. If it looks right, go ahead and peel off the adhesive and stick it in place.
With the Sterling Shelf Liners, it’s not really possible to reposition them. They are precut to fit your metal shelves and should fit right in place to do their job. You shouldn’t have to reposition them, but since they just slide onto the shelf, I’m sure you could remove them at any time.
The others are non-adhesive sheets and easy to move if you need to.