The inventory screen provides lots of information on one screen with the addition of tabs to hold different item types.
The paper doll has been a staple of the Diablo series and returns in Diablo 4 with equipment slots surrounding a player's character. The Paper Doll is a true representation a character and its gear.
Statistics are shown on the left of the paper doll which includes important stats such as:
The tabs along the top of the main item inventory section at the bottom of the inventory screen allow players to switch to each type of item stored in a player's inventory. This effectively means that item types such as Quests, Consumables and Mounts are kept separate from the main item inventory screen.
In Diablo 4 each character has a set number of slots in their inventory for temporarily storing items (that can be augmented with additional space found inside a stash which is a more permanent storage system where the player can store more items in the safety of a Town. Mounts will also have space to store items.
Items in Diablo games generally takes up sizes from 1x1 (like a potion or ring) to 2x4 (Great Longbow).
The shot below was taken in 2022 as part of the Hell's Ink event.
There has been few shots of the inventory but as it stands, each player has an inventory of 11 columns and three rows giving a total of 33 slots. This was shown in the development blog of December 2020.
These slots are then broken down into tabs, each of the same amount of 33 slots.