The array property Flags contains an auxiliary integer value for each particle. You can freely use it for your own purposes, Epina ImageLab does not process it in any way. A typical application of the flags would be to encode binary flags into an integer value and store it using the Flags property.
The parameter PartIx is the particle index (range 1..NParticles).
Hint:
In order to access the particles currently loaded in the particle editor you can use the pre-declared global variable PEData.
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