What is the easiest way to add two blank lines to a comment on a card? If I do it manually, only one shows, and
<br> doesn't seem to work either.
You can prevent a blank line from being merged with surrounding blank lines by pasting a Unicode space character on the line you want to keep. I tested this using U+202F (Narrow No-Break Space) copied from Character Map. On Windows, it's possible to enter this from the keyboard using Alt codes, but it requires changing a registry entry.