Change highlight color in search results in Outlook
Supposing you are searching the text of “test” in a mail folder, you enter the “test” in the search box, and then all “test”  are highlighted in the mail list and in the reading pane. By default, the highlight color is yellow. Some users may prefer to other colors rather than yellow.

Highlight emails sent only to me in Outlook
There are numerous emails gathering in your Outlook inbox, and it’s hard to distinguish the important one you thought to be from the whole inbox message. If you regard the emails that sent only to you as the important emails, it is still difficult to figure out which emails cc to you or just directly sent to you only at a glance. 

Highlight important emails in Outlook
Supposing you received an important email from your colleague in Outlook, the important email is marked with the small important icon  in the mail list. However, some users may think this important icon is not obvious enough, and they want to make the important emails outstanding. 

Highlight unread (new incoming) email messages in Outlook
In Outlook 2016’s mail folders, unread emails are distinguished by showing subjects in small blue font as below screenshot shown. This may be not obvious enough to highlight unread emails. In this article, we provide a solution to highlight all unread emails with bigger red font.