User Guide

FontLab 4
568
Highlight Differences
You may highlight the differences between the result of the rendered and
hinted outline and a bitmap. Enter the Bitmap mode and select the
Highlight differences command in the context menu:
When you leave the bitmap mode (click on the button or select any
other TrueType hinting tool) you will see that all pixels that are different in
the rendered outline and in the bitmap are highlighted in red:
You can use this feature to separate the “artistic” and technical parts of the
hinting process: make good bitmaps; activate the Highlight differences
feature; go into hinting mode and set hints so there are no red pixels.