Issue with Font Sizes in Epub - AZW3 Conversion

moldy · 03-19-2024, 08:28 AM

Modern books often contain text messages. To differentiate them from regular text I usually convert them to sans-serif font at 0.9em in the epub css.

Example:

Code:

.txt {
  font-family: sans-serif;
  font-size: 0.9em;
}

However after conversion to AZW3 the css is changed to:

Code:

.txt {
  font-family: sans-serif;
  font-size: 0.75em;
}

This arbitrary change can make the text difficult to read so I then have to edit the AZW3 to change the size back to my original setting.

I have noticed other font size changes (headings for example) but these are not as critical. Is there a way for me to keep the font sizes as I would prefer them to be?

I have not attached a file or log because this happens on every conversion so should be easy to replicate.

JSWolf · 03-19-2024, 08:32 AM

Quote:

Originally Posted by moldy

Modern books often contain text messages. To differentiate them from regular text I usually convert them to sans-serif font at 0.9em in the epub css.

Example:

Code:

.txt {
  font-family: sans-serif;
  font-size: 0.9em;
}

However after conversion to AZW3 the css is changed to:

Code:

.txt {
  font-family: sans-serif;
  font-size: 0.75em;
}

This arbitrary change can make the text difficult to read so I then have to edit the AZW3 to change the size back to my original setting.

I have noticed other font size changes (headings for example) but these are not as critical. Is there a way for me to keep the font sizes as I would prefer them to be?

I have not attached a file or log because this happens on every conversion so should be easy to replicate.

Go to Preferences > Common Options and see what the settings are. You may have Font size rescaling turned on. I have it off and I have Base font set to 0.0 and nothing in Font-size key.

kovidgoyal · 03-19-2024, 08:33 AM

see https://manual.calibre-ebook.com/conversion.html#fonts

moldy · 03-19-2024, 09:58 AM

Thanks Jon and Kovid for your quick replies. I had totally the wrong idea about font size rescaling and have now turned it off. Problem solved.

03-19-2024, 08:28 AM	#1
moldy Enthusiast Posts: 43 Karma: 10 Join Date: Oct 2015 Device: Kindle	Issue with Font Sizes in Epub - AZW3 Conversion Modern books often contain text messages. To differentiate them from regular text I usually convert them to sans-serif font at 0.9em in the epub css. Example: Code: .txt { font-family: sans-serif; font-size: 0.9em; } However after conversion to AZW3 the css is changed to: Code: .txt { font-family: sans-serif; font-size: 0.75em; } This arbitrary change can make the text difficult to read so I then have to edit the AZW3 to change the size back to my original setting. I have noticed other font size changes (headings for example) but these are not as critical. Is there a way for me to keep the font sizes as I would prefer them to be? I have not attached a file or log because this happens on every conversion so should be easy to replicate.

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03-19-2024, 08:33 AM	#3
kovidgoyal creator of calibre Posts: 45,664 Karma: 28549304 Join Date: Oct 2006 Location: Mumbai, India Device: Various	see https://manual.calibre-ebook.com/conversion.html#fonts

03-19-2024, 09:58 AM	#4
moldy Enthusiast Posts: 43 Karma: 10 Join Date: Oct 2015 Device: Kindle	Thanks Jon and Kovid for your quick replies. I had totally the wrong idea about font size rescaling and have now turned it off. Problem solved.