If you want to search for a multi-line string, usually you have to match the exact number of the lines:
Does this mean that I have to go to the end of each text document before searching to determine the exact number of lines?

And note that EmEditor cannot highlight multi-line matches with colors.
Mmmh, with
☑ Multiline
◉ Regular Expressions
in a .txt file the numbers 2 and 4 are marked in green.

Please regard this text as irrelevant.
That was a misunderstanding on my part.

For me, there are currently only two questions left unanswered:
– CTRL + ENTER (see previous post)
Exact search for a number with RegEx, e.g. find 2 and 4 in a range from 1,2,3,4,5,24 (see previous post).