The Filter is an item that can be used in any Grid.
In the Filter's GUI, which can be opened by pressing right click while holding the filter in hand, the player can specify which items and fluids can be visible.
Items and fluids
The player can choose to let the filter be damage or damage sensitive. It is also possible to use a mod filter.
The Filter can be set in a whitelist or blacklist mode, too.
Icon and name
The player can also configure an icon and name for the Filter.
In item mode, a item can be specified as an icon.
In fluid mode, a fluid can be specified as an icon.
As soon as the Filter has an icon specified, it will appear as a tab in the Grid. Then, open the tab to see the filtered items or fluids.
Use SHIFT + right click in your inventory while holding the Filter to clear it.