Learn about the bottom bar here
These are the "titles" of the bottom bar. You can use the edit button to use a helper.
These are the icons that are attached to the titles. So the first icon in this list is matched to the first title in the title list. You can use the edit button to use the icon manager.
These are the commands that are sent when each item is selected. This works in the same way where the first command is matched with the first title and first icon and so forth.
Tint to apply coloring to active title and icon item. Color picker is shown when you select this field.
Set the background color for the bar. Color picker is shown when you select this field.