[FelixKrull]

Thanks for your info.

Could you give me an example as I don't really know what to do here?

I made a little doc file with two words, one serif and one serifless and converted it without removing font-family.

The generated stylesheet.css looks like this:

.block_ {
    display: block;
    padding: 0;
    margin: 0 0 8pt
    }
.calibre {
    color: black;
    display: block;
    font-family: serif;
    font-size: 1em;
    padding-left: 0;
    padding-right: 0;
    text-align: justify;
    margin: 0 5pt
    }
.text_ {
    font-family: "Times New Roman", serif
    }
.text_1 {
    font-family: "Verdana", sans-serif
    }

I am not sure what to do next if I want to remove those fonts, but keep the serif/sans-serif info.

Do I have to use "additional css" or "change styles.."?

Thanks.