[Shadowman123]

Hello,

Maybe somebody can help with with the following question:
I have tried to use the new functionality "Tweak Epub" and opened the CSS file with Wordpad.
I would like to change some of the font sizes but I'm a bit confused with all the sections in the CSS and what they refer to in the "real" document.
It seems the sections are numbered. For example:

.calibre1 {
font-size: 1.125em
}
.calibre2 {
font-size: 1em
}
.calibre3 {
font-size: 0.75em
}
.calibre4 {
display: block;
page-break-before: always
}
.calibre5 {
color: windowtext;
display: none;
text-decoration: none
}

Is there a simple Editor with Preview where I can see the result of the changes I make in the CSS without having to rebuild the epub every time??

Thank you for your help.