Calibre 6.x UX issue - all text is greyscale

[DMcCunney]

I did a search but didn't see this issue mentioned. If it was and I missed it, I apologize.

It's less a Calibre problem than a new QT version problem, but I don't know what the fix might be.

I run Calibre on an HP desktop with twin 23" monitors, under Win 10 Pro with 20GB RAM and Intel HD 4600 on board graphics. OS and applications rre on a 256GB SSD, with two SATA HDs for data storage. I'm not a gamer, so the box is entirely adequate for my needs.

I don't keep current on Calibre point releases, and was still on the 5.44 release. I got a note there was a new major version of Calibre and decided it was time to upgrade. I had to uninstall and revert to the last 5.X version.

I'm beginning to have age related vision problems. One major one is the online default standard of gray type on a white background. There is insufficient contrast, and half the time I can't read it. I had already boosted Calibre's default font size and shifted to boldface on the 5.44 release.

Calibre 6.x is all grayscale text. Pure black seems to no longer be there. I simply can't use it.

There is nothing in 6.X I absolutely have to have, and 5.44 meets my needs, but it would be nice to be able to upgrade and still use Calibre.

Has this issue been reported? Is there an easy fix? If there is, please point me to it.

Thanks in advance.
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Dennis

[BetterRed]

What font in Look & Feel?

Someone was complaining about losing MS Shell Dlg 2, which was a 'Substitute Font' that MS have been trying to get rid for decades***.

Health Alert: Take a deep breath ==>> Calibre, MS Shell Dlg 2 missing

BR

***Something similar might be said about Substitute Fonts as Palmerston said about the Schleswig-Holstein question "[It] is so complicated, only three men . . . have ever understood it. One was Prince Albert, who is dead. The second was a German professor who became mad. I am the third and I have forgotten all about it.”

[kovidgoyal]

change the font to something that works for you in Preferences->Look & feel. Or more likely use the env vars to turn off Qt's high dpi scaling.

[DMcCunney]

Originally Posted by kovidgoyal

change the font to something that works for you in Preferences->Look & feel. Or more likely use the env vars to turn off Qt's high dpi scaling.

What env vars am I changing? I looked at a QT env vars list, but what I need to adjust is not obvious.
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Dennis

[JSWolf]

Originally Posted by DMcCunney

What env vars am I changing? I looked at a QT env vars list, but what I need to adjust is not obvious.
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[b]Dennis

QT_ENABLE_HIGHDPI_SCALING=0

[DMcCunney]

Originally Posted by BetterRed

What font in Look & Feel?

Segoe 12 pt bold. That's fine, and a larger size would cause other problems like the number and width of columns I can display on screen.

I want to keep the selected font, and simply have it displayed in Honest-to-$DEITY black instead of a shade of gray.

I think I'm going to have to install Calibre 6.21 Portable, and run it side by side with the HD installation, so I can test settings without an uninstall/reinstall exercise, and install Calibre 6.21 on HD as defualt if/when I get it to behave as desired.
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Dennis

[DMcCunney]

Originally Posted by JSWolf

QT_ENABLE_HIGHDPI_SCALING=0

Thank you! Testing shortly.
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Dennis

[JSWolf]

Another thing to try is Preferences > Look & feel > Column coloring where you can set the color to black.

[JSWolf]

Originally Posted by JSWolf

Another thing to try is Preferences > Look & feel > Column coloring where you can set the color to black.

[kovidgoyal]

See https://www.mobileread.com/forums/sh...d.php?t=348475