MobileRead Forums - View Single Post - Can i change the font size in a downloaded book

hobnail · 01-08-2022, 10:34 PM

Quick and dirty: Make a backup copy of the epub. Open the epub in calibre's editor. On the left go to the Styles section with the paint brush. For each .css file in there look for all lines starting with

Code:

font-size:

and change whatever is after the colon to 100%; keeping that semicolon. For example, if it's 0.5em; (with or without a semicolon) change it to 100%;.

That will make it a bit ugly since all text, even chapter heads possibly, the same size. But at that point you can use the text size slider of your ereader to adjust it to your liking.

01-08-2022, 10:34 PM	#2
hobnail Running with scissors Posts: 1,589 Karma: 14328510 Join Date: Nov 2019 Device: none	Quick and dirty: Make a backup copy of the epub. Open the epub in calibre's editor. On the left go to the Styles section with the paint brush. For each .css file in there look for all lines starting with Code: font-size: and change whatever is after the colon to 100%; keeping that semicolon. For example, if it's 0.5em; (with or without a semicolon) change it to 100%;. That will make it a bit ugly since all text, even chapter heads possibly, the same size. But at that point you can use the text size slider of your ereader to adjust it to your liking.