Sign into the Pico dashboard and navigate to the the Settings portion of your Pico Dashboard by clicking the appropriate icon on the navbar located on the left side of your site. You can also get there by heading to: https://dashboard.trypico.com/settings/account
Find the Website tab on the top navbar and click into it.
The Locked Articles subsection will be located just below the Domains subsection. You may need to scroll down to see the section fully.
Pico inserts a button after the article breakpoint when a visitor is required to sign up or pay to view content. This section allows you to edit the text on that button. Simply fill in the text you wish the button to display.
Once you are satisfied with your new button text, scroll to the bottom of the Locked Articles section and select Update profile. A success flag will appear if everything went correctly.