Go to the agent's tab and click on an agent you have created

Once inside your agent panel click triggers

For the Page type of triggers, Fill in the fields, Flags are the keywords that when found in the page URL a button will show up, the button will have the text from the Text field, and when clicked, it’ll open the link from the Link field

Click “Save”

Since the URL “https://preview-html5.playcode.io/” Contains the word “playcode” the button shows up at the top

When the button is clicked, the link from the link field is opened