Find Replace To Insert Carriage Returns

I'm working with a document that has several cells which require double carriage returns within cells. The location of each space is marked with an @ sign. A few weeks ago, I found an article online that explained how to do a find replace where the find value was '@' and the replace value was a series of numbers/characters that created a carriage return. When I doubled the carriage return code I got my two spaces. If I remember correctly, the string that I entered still appeared in the cell, so I needed to clean up afterwards by replacing that string with ' ', but it still left the line break.