However, let’s assume that you want to send some Excel spreadsheets to someone who has an old version of Excel. In this case, you must save the file in .xls format instead of .xlsx.

First, you can save the file in your local storage, sign in to your Dropbox account in a browser, and then upload the file. Second, you can connect Dropbox to Microsoft Word or Excel for the iPad ...

Select the "File" tab in Excel and choose "Options." Select "Quick Access Toolbar" from the list. Select "Commands Not in the Ribbon" from the "Choose Command From" drop-down menu.