Sorry ..real basic question.
How does one have multiple masks on the same Layer?
eg. 3 window frames in one image (layer) , each requiring an "insert" ( from one layer).
To learn how to use mask tools in detail type mask in the Search Help field at the top right corner of AE and follow the links provided for excellent tutorials and instructions.
Thank you Rick.
I got caught by "Subtract".
Logic was telling me I needed to "Add"