Open a Command-Prompt: EDIT
Type: ALT+10
(Similiarly, NotePad seems to generate the same Char)
A character will print on-screen, which should be 0x0A
Select/Copy that, Paste into EmEditor where you need the 0x0A
The unfortunate side-effect of that, is the File-type will need to be UTF-8 or UTF-16 — even though the character in question is not unicode.
I looked in EmEditor’s Insert-Special Character, curiously it is missing Ctrl-J, 0010 and Alt+10 is a character that neither can Notepad2, Ted Editor nor MetaPad generate ALT+10 — though they do do most of the other ALT+codes.
It is possible that the ALT+10 generated by Notepad or “Edit” isn’t actually 0x0A.
Although I’ve had success with codes prior to 0x0A in a regular ASCII file.