How to define a position with absolute length units (e.g. pt & pc)


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Yat_Zoeng
Yat_Zoeng
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Hi, everyone. I came across the problem of defining the position of a stimulus with absolute length scale. I need to set a picture right next to the fixxing point in the middle of the screen with a distance of 7° visual angle. So the picture is approxiamtely 13.55pc from the center. I wonder how I can actualize this position defination regardless of the screen size and resolution of the monitor.
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