Make a document read only - Microsoft Support
If you don't want content reviewers to accidentally modify your document, you can make the document read only before sending it for review. Another method is to restrict formatting and editing. Making your document a read-only file means that the document can be read or copied but not modified.
Keyboard shortcuts for the File menu in Microsoft 365 for Windows
To quickly find a shortcut in this article, you can use the Search. Press Ctrl+F, and then type your search words. In the normal, editing, or Inbox view of your Microsoft 365 app, press Alt+F. The File menu opens. It is divided into several pages, sometimes called tabs, which contain more options on the subject of the page.
Reduce the file size of a picture in Microsoft Office
You can send files with high-quality images easily, and without file limits, by saving to the cloud and then sharing files from OneDrive. When you don't need every single pixel in an image to get an acceptable version of it, you can compress pictures to make the file size smaller.
Remove a password from a document - Microsoft Support
Removing a password from a document is a simple process, but you have to know the original password. Open the document and enter its password. Go to File > Info > Protect Document > Encrypt with Password. Clear the password in the Password box, and then click OK. Was this information helpful? Easily remove a password you set on your document.