I did something accidentally to Excel 2007, but I do not know what I did. All I know is I now do an easy command that I use frequently and it no longer works. Simply, Format>Row>Row Height. I put in "20" to change the row height from "14" and --it doesn't work! I try to change it to 50 and -- it doesn't work. I restart Excel --still doesn't work. I restart the computer, open Excel, try it again and --it still doesn't work. Created a new file--it still doesn't work. What did I do and how can I fix it?