I am a very basic user, I scan pencil (comic) drawings as tiffs and use Photoshop cc 2015 to darken the lines and clean up a bit, and put text balloons and save again as tiffs. I use the 'levels' layer to blacken.

I have done this for a while (15-20 drawings) but now I have a page that shows nicely on screen but when I save as tiff (or bmp or anything) the black drawing lines that I see on screen are grey.

When I merge they also become grey. When I merge and add a new 'levels' layer it shows black nicely again but when I merge and/or save, they black becomes grey again. I suspect I changed a setting.

Before merging it looks like this:

Before merging

After merging or saving it looks like this:

After merging

  • 1
    Are you viewing at 100% when making adjustments? You should always because at any zoom level, but especially with reductions, there can be preview anti-aliasing taking place altering what you see.
    – Scott
    Commented May 15, 2021 at 10:30
  • Thank you. Good question. I work at 10-50%, and indeed at 100% there is actually no visible difference between the two above images. But playing with it and increasing the left 'level' from 178 as the image above as high as 253 makes no difference. It seems that the "levels" layer is active and shows on screen but is ignored when merging or saving.
    – GiB
    Commented May 15, 2021 at 11:16

1 Answer 1


For anyone interested, I found the answer. I must have scanned the tiff file under a different format than greyscale. Perhaps B&W? I rescanned my drawing as I always do, and now the same layers work fine! Cheers. GiB

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