Anyone else ever noticed that applying background masking to Dimension text, Mtext, and Mleader text is done three different ways in Properties? I wonder why they just don't all have the same properties and the same UI for accessing those properties.
Mleader = There is a dropdown box named "Background Mask" with two choices: Yes & No.
Dimension = There is a dropdown box named "Fill Color" with color choices, where "Background" = masking.
Mtext = There is a field labeled "Background Mask" with an ellipses button [...] that opens a popup box to set options.