How do I choose which program opens my photos or PDFs?

You'll be able to: Set your permanent default app for any specific file type using Open with

The steps

1
Right-click on any file of that type (such as a PDF document, video, or picture). A context menu appears next to your mouse pointer.
Right-click context menu pointing to the Open with submenu.
Screenshot on the way. The steps above are complete without it.
2
Move your mouse over Open with and click Choose another app. A window titled "How do you want to open this file?" pops up with a list of installed programs.
Dialog listing available programs with the Always button.
Screenshot on the way. The steps above are complete without it.
Why not just double-click?
Double-clicking immediately opens whichever program Windows chose first. Using "Choose another app" lets you change that choice permanently.
3
Click your preferred program from the list, then click Always. The file opens in your chosen program, and all other files of that same type update their icon to match.
Tip
If you only want to use this app once without changing the permanent default, click Just once instead of Always.

It looks different on my screen

On Windows 10, check the box that says Always use this app to open files at the bottom of the window, then click OK.

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