This page is about the Crafting Interface. For the crafting area, see Crafting Table
The personal crafting interface is always available. To use it, open your inventory. However, as it is only 2x2, it is only useful for crafting items such as torches, and the crafting table.
The crafting table has a 3x3 area for crafting, which allows players to craft more complex items, such as tools.
If you leave items in either crafting area, then exit your inventory/crafting bench, the items will drop out of your inventory.