Left side button invoke Mail tool

"Set" button opens Mail Setting Window.

"X" button deletes the item.

Up Down button drag and drop moves items.

Number of Items is limited to 8 in free version.   If you want to set more items, please purchase "ttm2_number_unlimited" item in Purchase window. 

Landscape window.

Black background.

If you enable "Invisible Setting Button" in Setting window, "Set" button will be deleted.