Greetings! I am Ajibola, and I am eager to assist you with confidence and assertiveness. I guarantee to provide you with exceptional support.
It seems that your document is in compatibility mode, which means that it was created or saved in an older format of Word, such as Word 97-2003. Compatibility mode preserves the layout and features of the document, but it also limits some of the new features and functionality of Word 365.
You can convert your document to the new format of Word 365, which is called Word Document (.docx). To do this, go to File > Info and select Convert. This will upgrade your document to the latest format and enable all the new features and functionality of Word 365. However, this might also cause some minor layout changes, such as spacing, alignment, or fonts.
You can edit your document in compatibility mode without converting it to the new format. To do this, go to File > Info and select Edit Anyway. This will allow you to make changes to your document, but you won't be able to use some of the new features and functionality of Word 365. You can also check the compatibility issues by selecting Check for Issues >Check Compatibility.
Note: You might need to translate the page content in the link shared below.
https://support.microsoft.com/office/compatibility-changes-between-versions-692289af-b760-4698-8326-14b2edcd6552
If you have any further questions or need additional assistance, please feel free to ask. I'm here to help!
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Kind regards.
Ajibola.