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Examples

Clear layer M0
To layer: M0
Expression: 0
Copy layer M1 to layer NEW
To layer: NEW
Expression: M1
Copy the inverse of layer M1 to NEW
To layer: NEW
Expression: !M1
Copy the intersection area of I1 and I2 to NEW
To layer: NEW
Expression: I1&I2
Copy the R1 and R2 areas to New
To layer: NEW
Expression: R1|R2



Stephen R. Whiteley 2017-03-22