In order to make any changes to an off-market leads spreadsheet, you first have to download it.

Please follow the steps below:
  1. Open the spreadsheet
  2. Go to file and click on "Download as"  (See the screenshot below)
  3. Select the format in which you want to download it. (Use Excel if you have it - if not you can go to your Google Drive and upload it from Sheets).
  4. Once you download it, you can filter, sort, or edit the spreadsheet in the way you want, including doing a mail-merge.