You can favorite (bookmark) the items you want in the inventory so they are alvways visible at the top.
How to set Favorite Items:
In the inventory, select the item you want to favorite.
On the item details vew screen, tap [Favorites] at the top to designate it as a favorite.
Favorite items will be marked with a star icon and iwll always be easily accessible at the top fo the inventory.
If you wish to remove an item from favorites, touch the activated [Favorites] again.