Using a MaskField, where multiple bits are set, displays “Mixed…” as shown below:
This makes it very difficult to see at a first glace how a certain object is set up, because it’s just “Mixed”. I would find it more useful if it displays what’s set in the button already:
In this case I don’t need to open the popup, as I can see “First” and “Third” are set. If there isn’t enough space to displays an item, add “…” at the end. For example, if there is no space for the text “Third”, you should display: “First, Second …”