Seems like this should be fairly simple, but I can't find a simple solution.
Is it possible to highlight the content of emails received in Outlook 2010 without creating an entirely new message?
Step 1 - Open the received message.
Step 2 - Click Actions / Edit Message on the Ribbon, Message tab
Step 3 - Now select your text and click Highlight on the Format Text tab
Step 4 - Click Save on the Quick Access bar to make changes permanent
Before and After example:
Ok, if I understand you correctly. These three actions will allow you to highlight text in outlook 2010 but I think something a little more elaborate is required. If so, please elaborate in your question.
You can just highlight the text with the mouse.
Open the format text tab in the ribbon.
Click the "Text Highlight Color" button to highlight the text to a color of your choice.