Highlighting Text in Emails

Morning.

I’ve imported an email into DTPO. The email is displayed in alternative view. Therefore, I can select some text of the email. But obviously I can not highlight this text, as I could do, if it would be a PDF file with recognized text. ⇧⌘L is grey/inactivated.

So, the question is: How can I highlight text in imported emails?

Thanks in advance for your support!

Kind regards, Friedrich

.eml files are not editable, so highlighting is not possible. You could convert the file to, for example, a Formatted Note or RTF?