Hotbar Inventory
A hotbar inventory displays items at the bottom of the screen. You can scroll with the mouse wheel to select a slot, and if that item is equippable, it will be equipped.
Setup
First, make sure you have setup an Inventory Controller.
To add a hotbar inventory, simply drag the InventoryHotbar prefab into your scene, which is located in the Core > Prefabs > Inventories folder.

Note
The GameObject does not need to be a child of the ExplorationToolkitManager, as this is not a registered system.