By default Windows 10 is set to use the Microsoft browser, Edge, to open & view .pdf files. This can be cumbersome since Edge can limit what functionality you have. Follow these steps to change the default app to Adobe Acrobat Reader or Acrobat.
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Click on the Start menu and start typing Default apps.
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Click on that option when it appears in the list.
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On the right side of the window, scroll until you can see & click on the text link for Choose default apps by file type.
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On the right, locate the hidden scroll bar and scroll down until you see .pdf in the very left column.
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To the right of .pdf, click on the shown option (probably Edge).
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From the drop-down list select either Adobe Acrobat Reader DC or Acrobat DC.
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You can now close the Settings window.
Watch a short video tutorial below on how to set Acrobat Reader as the default program for opening .pdf files on Windows.