What is the usage of Y coordinate in LayerToCanvasX(layer,X,Y) expression? It seems that the Y coordinate has no effect on the return value of the expression. Same goes to LayerToCanvasY,CanvasToLayerX,CanvasToLayerY.
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It is necessary for calculating the correct answer when the layer or layout is rotated, since there is no longer a linear correlation between the axes. If you don't rotate anything though, I think you can ignore it, but you may as well provide it the right value in case you change your mind later.
Ahh I see, thanks for the reply!