GREP style after double line break

I’m not a GREP expert, but I think the pattern for your GREP Style would be

APPLY:
Bold [character style selected from menu]

TO TEXT:
Line break, Line break, Any character repeated one or more times, Line break

which in GREP-ese is \n\n.+\n

I did a test over here and that seems to work. Does it for you?

To be clear, this is what you’d edit in the *paragraph style’s* GREP Style panel. The paragraph style that you’ll be applying to the paragraphs containing all the titles.

It’s not a GREP Find/Change … but the same codes could work there.

GREP styles are defined inside a paragraph (or paragraph style). Which means that you’d first have to apply a paragraph style to those titles — in which case you don’t need a GREP style, you simply make the formatting part of the paragraph style. Also, Anne-Marie correctly wrote that you can look for \n, but that’s a forced line break. If those line breaks are paragraph breaks then you can’t use a GREP style.

Why don’t you apply a paragraph style with a GREP find/change? Look for (?<=\r\r).+ and apply a paragraph style. And if you set space before in the paragraph style, you can remove those two line breaks (which you really should do): Find what: \r\r(.) Change to: $1 Change Format: