How to add a blank lines for a new paragraph in a chapter

[Ianos]

I regularly convert from ePub to mobi for my Kindle Paperwhite and usually the formatting looks good.

Now I have a book here where a new paragraph in a chapter is formatted with the class <p class="GT-1LZ_vor ParaOverride-11">Text (...)</p>. In the eBook, a blank line should actually appear so that the reader understands that something new is starting. In HTML and mobi, however, no blank line is displayed.

The structure of the HTML looks like this:

<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>
      <p class="GT-1LZ_vor ParaOverride-11">New paragraph (...)</p> 
<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>

Two questions:

1. How can I modify the CSS so that an empty line is output before the class "GT-1LZ_before ParaOverride-11"?

2. I have done a few spot checks and it looks as if separate CSS classes are used for each book or series. Is that the case? How does Calibre translate all these classes in a meaningful way? If the answer is already available somewhere, a link would suffice.

Many thanks in advance!

[Quoth]

Edit class "GT-1LZ_before ParaOverride-11" to have a suitable top margin, say
margin-top: 1em;
OR
Edit the class of the item before the first paragraph
margin-bottom: 1em;

eBooks should never have actual blank lines, just the appearance of one. Change 1em to any number you prefer. Also for most ereaders 12pt = 1em if font sizes are in pt.

[JSWolf]

You should be converting your ePub to KF8 as that will look better and Mobi is obsolete. Plus with KF8, you can use your choice of font to read with and adjust the weight as needed.

[theducks]

Old Mobi did not have a CSS.
AZW3 (KF8) does.
You have a device made after the Kindle3, so why use a boat anchor of a format?

[JSWolf]

Originally Posted by Ianos

I regularly convert from ePub to mobi for my Kindle Paperwhite and usually the formatting looks good.

Now I have a book here where a new paragraph in a chapter is formatted with the class <p class="GT-1LZ_vor ParaOverride-11">Text (...)</p>. In the eBook, a blank line should actually appear so that the reader understands that something new is starting. In HTML and mobi, however, no blank line is displayed.

The structure of the HTML looks like this:

<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>
      <p class="GT-1LZ_vor ParaOverride-11">New paragraph (...)</p> 
<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>
<p class="GT">Text (...)</p>

Two questions:

1. How can I modify the CSS so that an empty line is output before the class "GT-1LZ_before ParaOverride-11"?

2. I have done a few spot checks and it looks as if separate CSS classes are used for each book or series. Is that the case? How does Calibre translate all these classes in a meaningful way? If the answer is already available somewhere, a link would suffice.

Many thanks in advance!

Instead of using a blank space for a section break, you are best to use something visible to show the break. I use a 20% long 2px centered line for the section break.

HTML

<hr/>
<p>

CSS

p {
  margin-top: 0;
  margin-bottom: 0;
  widows: 1;
  orphans: 1;
  text-indent: 1.2em;
}
hr {
  margin-top: 0.9em;
  margin-right: 40%;
  margin-bottom: 0.9em;
  margin-left: 40%;
  border-top: 2px solid;
}
hr + p {
  text-indent: 0;
}

[Quoth]

Originally Posted by theducks

Old Mobi did not have a CSS.
AZW3 (KF8) does.
You have a device made after the Kindle3, so why use a boat anchor of a format?

Only the K1, K2, DX and DXG HAVE to use mobi (KF7, sometimes an azw ending without a digit). It's terrible as it's HTML 3 with no CSS and some custom extensions.

As theducks says, use KF8 / azw3.

If an older Kindle other than those has no "Publisher" option on Fonts Aa, then it hasn't got the backported Firmware updates:
https://www.amazon.com/gp/help/custo...MQC26VQQMM8XSW

First hit with DuckDuckGo Kindle Firmware Updates.

[Ianos]

Thanks a lot for your help! I will use azw3 now!