We'll first add the Add and Delete buttons to the toolbar:
- From the Project Assets/SimpleIcons/Prefabs folder, drag the DeleteButton prefab to the Hierarchy as a child of Toolbar.
- Set its Position X to 0.15.
- Add the PictureAction script component to the button.
- Set its Command to DELETE.
- From the Project Assets/SimpleIcons/Prefabs folder, drag the AddButton prefab in the Hierarchy as a child of Toolbar.
- Set its Position X to 0.65 so it's a little off to the side.
- Add the PictureAction script component to the button.
- Set its Command to ADD.
The completed toolbar now looks like this: