Hi again Autumn,
OK, well that is weird. I have tried to find settings which will reproduce what you are seeing but I cannot - it always works.
I have looked at the code for the PCA window and it appears to simply use the dot size selected as the number of pixels, without compensation for high-resolution displays. Do you have a particularly high-resolution screen?
Beyond that, can you let me know exactly what version of Spike2 you are using? If possible, can you check if a newer release of your version (so if you are running 9.x, look for a newer version 9 release and so forth) of the software is available and upgrade to that?
Tim Bergel Cambridge Electronic Design