How to Add Verbiage to "My Compensation" Page Header?

Hi,

We have a requirement to display the following verbiage in the header of the My Compensation page:“Salary Range indicates full-time annualized salary.”
I’ve attached a screenshot for reference. I attempted to add this using Advanced Mode, but the changes are not reflecting when I preview the page. Has anyone encountered a similar issue or could advise on the correct steps to successfully add this verbiage to the My Compensation - Header page?

Thank you in advance for your support.