[enuddleyarbl]

Originally Posted by Turtle91

...
find: <p class="first">([A-Z])([A-Z ]+)*
replace: <p class="first">\1\L\2\E

I don't recognize \L or \E in regex (neither does Calibre). Is that particular to Sigil?

EDIT: An example of what I get as a result:

W\LHAT EMBLEMS\E

EDIT 2: According to:

https://regex101.com/

\L and \E are specific to "PCRE (PHP <7.3)" and Calibre's editor is Python based. I can't find an equivalent.