Menu Slots

To change the item type, you just need to rename the item you want using an anvil or through commands like /ie rename from ItemEdit.

The names you must use for slots that have actions are the following:

Name	Action
{LAST_SLOT}	It will perform the action of going to the previous page but will only appear if necessary, meaning if you are on page 2.
{NEXT_SLOT}	It will perform the action of going to the next page but will only appear if you have kits on page 2.
{CLOSE}	It will perform the action of closing.