Windows 10


Click the "Microsoft Office Button"  and then click Open

Important: If you don't see the  "Microsoft Office Button"  , Click Open on the File menu.

(Keyboard shortcut: To display the "Open dialog box", press "CTRL+O".)


In the "Look in" list or "Navigation pane", click on the folder, drive or location that contains the file that you want to open.


Note: By default, the files that you see in the "Open dialog box" are only those files that are created by the program that you are using. For example, if you are using Microsoft Office Excel, you do not see files that are created by using Microsoft Office Word unless you Click on "All Files" in the "Files of type" box.


Click the file and then click Open.


If the steps above fail, follow the steps in this article, Import or export text (.txt or .csv) files

Mac OS

You can select which app you use to open a file. This is useful if you prefer to use a certain app, or if you don’t have the app that was used to create the file.


Open a file once with a specific app

Do one of the following:

  • Drag the file onto the app icon in the Finder or the Dock.
  • Select the document in the Finder, then choose File > Open With.
  • Control-click the document, then choose Open With.
  • Open the app, then choose File > Open.


Permanently change the app used to open a document

  • In the Finder, Select the "document", then "Choose File" > "Get Info".
  • You can also Control-click the document, then Choose "Get Info".
  • In the "Info window", Click on the "disclosure triangle" next to "Open with".
  • Click the "pop-up menu", then Choose the app.


To open all documents of this file type with this app, click Change All.


If you can’t open a file with a specific app, the file may be damaged or may not be recognized by that app. Try opening it with a different app.


This Mac OS section was originally published on: https://support.apple.com/kb/PH25685?viewlocale=en_GB&locale=en_GB