Rather than keeping the snapshot scale bar as a fixed number of pixels in length, consider using this as a "nominal" scale bar length, then rounding the physical distance (1-2-5 steps probably is good) and adjusting the pixel length to match the rounded distance.
Most users would probably prefer a 200 or 500um scale bar to a 284um one.
Rather than keeping the snapshot scale bar as a fixed number of pixels in length, consider using this as a "nominal" scale bar length, then rounding the physical distance (1-2-5 steps probably is good) and adjusting the pixel length to match the rounded distance.
Most users would probably prefer a 200 or 500um scale bar to a 284um one.