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Seperating picture updates?

HI,
I have a picture control which has to display a grid and then dots on it that move arround. So the info for the dots comes from an array and the grid is just a subVI, now I have run the Profiler and it shows that since I am passing my picture through a sequence with lots of shift registers (this is part of the problem) and the grid gets repainted every time that a dot moves. Is there any way to just paint the grid once and leave it there then when the dots move just update the dot display and NOT redraw the grid every time?
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Try not using the shift registers. Right-click on the picture indicator and select "Erase first".

Check the attached vi.
www.vartortech.com
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