List and thumbnail views
The icon in the top-right corner of the Onedrive app lets you select either list view or icon view. In icon view, images show as thumbnails, which makes it easy to browse your photos. Folders that contain images show a tiny bit of an image on the folder icon, but IOS shows it more clearly.
Both the Android and IOS apps now support landscape view (not so long ago you could only use portrait view). The Onedrive app can view 130 different file types, so if you come across a file you can’t open on your PC, try putting it in your Onedrive folder and see if it opens on your mobile device.
Point your device at the document you want to scan and take a photo of it