The hotbar in the editor is useful to add assets to, as it allows you to quickly select commonly used items to place into your world. However, once it is full, you have to replace the items in it.
This feature request suggests that Crayta should allow you to clear the hotbar (probably with a button next to the hotbar), so that you can then easily select a number of assets to fill it up again, without manually replacing individual items in it. This would apply to both basic mode and advanced mode.
Votes on original board: 6