Quote:
Originally Posted by japinder
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A new problem, I don't know whether I like '-cmax 3' or '-cmax 4' more. The black text really pops on an almost white background with 4, but the diagrams look washed out. 3 gives somewhat more realistic diagrams, but I miss that pop. Looks like I have a problem of plenty. 
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You can try adding different gamma e.g. -g 0.55 or -g 0.6 etc. at -cmax 3, it will make background whiter than with -cmax 3 only, at the same time probably not reducing table's nuances by too much.
As it says up there behind Help menu, under command-line options:
-g <gamma> Set gamma value of output bitmaps. Default is 0.5.
A value less than 1.0 makes the page darker and may make the font more readable.
BTW, to reduce the time needed for similar testings I would usually export several problematic pdf pages as new pdf and use it instead of complete pdf, but we can of course use field "pages to convert" typing in there e.g. something like 7-9,33 to process just pages 7,8,9 and 33.