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You can edit any Office document including spreadsheets, slide presentations, and word processing documents. [1] X Research source

You can edit any Office document on your mobile device, including spreadsheets, slide presentations, and word processing documents. If you don’t have the editing app installed (e. g. Word, Excel, or PowerPoint), you’ll be prompted to install it shortly.

If you already have the proper app installed (e. g. Excel to edit a spreadsheet), the file will open in that app. If you don’t have the required app, the App Store or Play Store page for the app will appear. Install it, return to the file in Dropbox, then tap Edit again to edit the document.