Final answer:
Setting editing restrictions to 'No changes' makes a document read-only, which means that no modifications can be made to the content. Any attempted changes made to the document would appear in red but won't be saved.
Step-by-step explanation:
Editing Restrictions on a Document
When you set editing restrictions to 'No changes', the document is made read-only. This means no modifications can be made to the content of the document. This also means that all edits made directly to your document will appear in red (for added text), or red text with a strikethrough (for deleted text). However, these changes will not be saved, as the document is restricted from making any alterations.
Learn more about Editing Restrictions