I have a Numbers 2009 (I think) spreadsheet that is 15 columns wide and 1,040 columns high. I want to filter by criteria based on the content of a certain column, so I click Reorganize in the toolbar. Under "Search rows that match the following", I select the column heading and type in the criteria (for example, Contains > Movie). However, I cannot select the checkmark box next to where it says "Search rows that match the following". The checkmark box is grayed out. Why is this disabled? When I try to add more criteria, the computer just "burps" and quickly flashes the check before quickly taking it away. I think it's fairly recent. I'm fairly certain that it worked with the first 900 rows. I couldn't find anything in the Numbers help file about it. I posted this question to answers.yahoo.com but nobody replied. Please help! I'm running a PowerPC G5 PowerMac upgraded to 4GB RAM. I'd call myself something of a newbie. Thanks to all posters in advance.