Thank you very much, and to poire-z of course!!!. I now only have four files in the folder /koreader/fonts/vollkorn:
Code:
Vollkorn-Bold.ttf
Vollkorn-BoldItalic.ttf
Vollkorn-Italic.ttf
Vollkorn-Regular.ttf
And it works. Did I get it right, the fonts are recognized by the "font weight metadata", or by the file order? And KOReader can only recognize the four, otherwise something unpredictable happens.
How works bold, italic... if only the "regular" file is there? Is it calculated by KOReader from regular and is it more accurate with the corresponding files?