First, there are a lot of "manual line breaks" in text documents such as lyrics downloaded from the Internet. First, replace it with "paragraph mark";
Ctrl+H, open replace:
Put the cursor in the "Find What" box, Advanced-Special Characters-Manual Line Break;
Place the cursor in the "Replace with" box, special character-paragraph mark;
Replace them all. ?
Step 2, replace some paragraph marks with symbols or spaces;
Ctrl+H, open replace:
Put the cursor in the "Find what" box, advanced-special characters-paragraph mark;
Put the cursor in the "Replace with" box and knock out two spaces with the keyboard;
Replace them all. ?