When I edit epub ebooks, I try to make them as light as possible by removing all the tags that are not strictly necessary, usually ending up with a stylesheet with anything from 2 to 8 styles at the most for books with 1000s of pages. It can reduce the size of the ebook by half or more.
This is of course repetitive.
Is there a way to batch-process a number of search and replace commands all at once instead of having to type them in? I wouldn't be surprised if that has been included, I just haven't found it.
These are just a few of a long list that I use with every book I edit.
REPLACE
<body [^>]*>
WITH
<body class="calibre">
REPLACE WITH NOTHING
id="[^\"]*"
<a [^>]*>
REPLACE this with that
<b [^>]*> <b>
<i [^>]*> <i>
<em [^>]*> <em>
ETC. ETC.
Thank you for your time.