CS5 when I try to crop a jpg or psd file the image on my work area and the thumbs in layers go blank. When I hit "step backward" they reappear. Any ideas?
Check the width, height or resolution fields in the tool options bar while the crop tool is selected.
Perhaps you have some very small values in one of those fields.
Anyway, you can press the Clear button in the tool options bar to clear those fields.
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