How do I enable/disable Lumin PDF as the default PDF viewer from my Google Drive?

When you connect the Lumin PDF app to Google Drive, you can select Lumin PDF as your default viewer for easy viewing, and, annotation of PDF documents.

Enabling as Default: 

1. First, ensure you have installed the Lumin PDF app to your Google Drive. Find out how here


2. Go to your Google Drive: 


2. Click 'Settings'
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3. Click 'Manage Apps'

4. Find Lumin PDF

5. Next to the Lumin PDF app, to the left of "Use by default," check the box.
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Disabling as Default: 

To disable Lumin as the default app follow the above steps, and ensure that in Step 5 the box is unticked