spacing = 10 | Horizontal space to leave between items. |
align = 'c' | Vertical alignment of items. One of 't', 'c' or 'b' for top, centre or bottom. |
equalize = '' | Specifies whether to make the size of all items equal in the horizontal and/or vertical direction. One of 'w', 'h' or 'wh'. |
expand = None | Specifies which item, if any, is to change size horizontally when the container is resized. May be the item itself or an index into the item list. Items to the left of this item will be anchored to the left of the container, and items to the right will be anchored to the right of the container. |