Inventory pop up screen
The inventory is the pop-up menu that the player uses to manage items they carry. From this screen a player can equip armor, craft items up to 2x2 size, and equip tools and blocks. Also here is the player's custom Minecraft skin.
The default key for opening the inventory is 'i'. You can close it with 'Esc' key.
Your inventory consists of 4 armor slots, 27 storage slots, and 9 hotkey slots. Items in the hotkey slots can be selected during play using the keyboard (keys 0-9) and placed or wielded with the mouse buttons. Items placed in the 2x2 crafting grid will remain there, unlike those placed in a workbench's crafting grid. This effectively gives an additional four slots for storage. However, items in the crafting grid will not drop on player death.
Some items stack, up to a maximum of 64 in one slot. Notably blocks do stack but tools and food do not. Some items have different maximum stack sizes; for example, Snowballs stack up to 16.
Items dropped in the game world will disappear after 15 minutes if not collected. Placed items (right click) will not. Chests can be used to extend your inventory space, but they must be placed in the game world before they can be used.
Armor is only considered equipped when it is in an armor slot; when in your regular inventory it is not considered "worn" and does not offer protection.
As of Seecret Friday Update 9, inventory is now saved on multiplayer servers, so that your personal inventory, chests, etc. are now saved when you leave, allowing you to continue where you left off.