Is there a way to show the hexadecimal representation of text?
For a single character you can use the command “Toggle Unicode Notation”. For me it is on short cut key “Alt+X”, but that differs by language. Use the Customize dialog to create an access as you like.
If you’re trying to debug a weird document, then you can unzip it and open the content.xml file in a hex editor. This is a bit annoying as there is still a bunch of meta-information (xml) in the file to sift through, but it is doable. On the rare occasions I need it, I use hexedit on Linux.
What are you expecting from a hexadecimal representation of text?