Bitmask Editor

If you chose to edit a bitmask the Bitmask Editor appears like in the following screenshot:

In the upper area of the window the properties name, description, color and transparency can be changed.
in the lower part of the window the expression can be defined with a few mouse clicks or typed into the text field on the right.

Building a bitmask expression

Creating an expression for a bitmask is done like defining expressions with the Arithmetic Expression Editor.