Your PDF reader or preferred program is out of date and needs an update. Your PDF application is potentially damaged or needs to be rebooted. The PDF is potentially damaged or tampered with. A potential virus or malicious attack is embedded into a PDF file.
Source : https://www.adobe.com/acrobat/hub/why-pdfs-will-not-open.html
SolutionGo to Chrome Browser.Navigate to Settings > Privacy and security > Site settings > Additional content settings > PDF documents.Select the option Open PDF in Chrome.
Source : https://knowledge.workspace.google.com/kb/how-to-open-a-pdf-file-without-downloading-it-000002252
Ctrl+Shift+H. Apply bold formatting. Ctrl+B. Add a bulleted list.
Source : https://support.microsoft.com/en-us/office/keyboard-shortcuts-in-word-95ef89dd-7142-4b50-afb2-f762f663ceb2
File ManagerOn your Android phone, go to Play store.In the search slot enter Files by Google.The following screen appears:Make sure to select the Files by Google app from Google LLC. ... Tap the Install button and follow on-screen prompts.More items...
Source : https://geosoftware.faculty.ucdavis.edu/resources/android-files-by-google/
In Photos on iCloud.com, click the Recently Deleted album in the sidebar. Select the photos or videos you want to recover, then click Recover.
Source : https://support.apple.com/guide/icloud/delete-and-recover-photos-and-videos-mm08b49040b5/icloud
View your filesOn your Android device, open Files by Google .Tap a category. You'll see files from that category in a list.To change how the files display, tap Grid view . To go back to a list, tap List view .Optional: To sort your files, on the top right, tap More . Select Sort by.
Source : https://support.google.com/files/answer/9765314?hl=en