Negating the Effect of Windows Text Scaling on Conversion

Waldovski · 04-25-2018, 10:32 AM

I recently purchased a new laptop and I wanted to migrate with my Calibre library and settings. I copied my library and my settings folder (Preferences - Miscellaneous - Open Calibre configuration directory) into my new PC. Tried to convert an identical EPUB to PDF using the identical settings. Both computers ran Windows 10. But the output was different.

After pulling my hair about this for a while, I realised what the problem was. There is a Windows setting that interferes with the conversion; specifically, under Settings - System - Display - Scale and Layout in Windows 10. Text scaling was 125% on my new machine and 100% on the old one. When I changed scaling to 100% on my new machine and converted again, the PDF outputs matched.

All well and good, except that I can't run my new PC on 100% text scaling because everything becomes way too tiny.

So in lieu of changing the text scaling every time I want to convert, is there a way to negate the effect of this setting on conversion in Calibre?

kovidgoyal · 04-25-2018, 11:03 AM

Use the font scaling settings in the calibre conversion dialog to reduce the font sizes by 25%. Other than that, I can't think of anything, the PDF conversion is done via Qt and I dont know of a way to prevent it from using the system's scaling settings.

04-25-2018, 10:32 AM	#1
Waldovski Junior Member Posts: 1 Karma: 10 Join Date: Apr 2018 Device: none	Negating the Effect of Windows Text Scaling on Conversion I recently purchased a new laptop and I wanted to migrate with my Calibre library and settings. I copied my library and my settings folder (Preferences - Miscellaneous - Open Calibre configuration directory) into my new PC. Tried to convert an identical EPUB to PDF using the identical settings. Both computers ran Windows 10. But the output was different. After pulling my hair about this for a while, I realised what the problem was. There is a Windows setting that interferes with the conversion; specifically, under Settings - System - Display - Scale and Layout in Windows 10. Text scaling was 125% on my new machine and 100% on the old one. When I changed scaling to 100% on my new machine and converted again, the PDF outputs matched. All well and good, except that I can't run my new PC on 100% text scaling because everything becomes way too tiny. So in lieu of changing the text scaling every time I want to convert, is there a way to negate the effect of this setting on conversion in Calibre?

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04-25-2018, 11:03 AM	#2
kovidgoyal creator of calibre Posts: 43,858 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Use the font scaling settings in the calibre conversion dialog to reduce the font sizes by 25%. Other than that, I can't think of anything, the PDF conversion is done via Qt and I dont know of a way to prevent it from using the system's scaling settings.