[theducks]

I use the TOC tool in the Editor (or main Calibre toolbar )
But that is some ugly code (

<p class="calibre_12"><font size="4"><span class="bold">Chapter I</span></font></p><p class="calibre_12">- AT MAYTREE COTTAGE</p>

)

font sizing should be done in the CSS. <h tags are bold by default

First step is to 'pretty' the code using the flower icon (main toolbar) in the editor so any pattern match has a better chance


Personally, I would code this as:

<h3 class="chapno">Chapter I&nbsp<br />- AT MAYTREE COTTAGE</h3>

This creates a 2 line Visual, but shows up in the TOC as a single entry

where .chapno in the CSS would control the style
line-height: 2 ; spreads the lines further apart

I think this EDITOR REGEX search may work. (Replace and Search, NEVER all)

Find <p class="calibre_12"><font size="4"><span class="bold">(Chapter .+?)</span></font></p><p class="calibre_12">(- .+?)</p>

Replace <h3 class="chapno">\1&nbsp<br />\2</h3>