Use a walkthrough
The easiest way to mimic a small banner appearing centered at the top of the page is by using a single-step walkthrough.
- Create a new walkthrough with a single step. Add a title and content:
Configure it to Show as Splash Screen
- You can adjust the width of the bubble by configuring the Bubble Width:
- In the advanced settings of the walkthrough step, set the x-offset to center and the y-offset to top (or bottom if you want the walkthrough to appear at the bottom of the page):