(This is for the popup program called POPUP: SPECIAL ALERTS under your APPS menu item of your website user menu. If your alert section is not called that in the menu, please use the other help file in the popups category here)
When logged in, click on APPS>POPUP: SPECIAL ALERTS.
There should be one alert there called SAMPLE POPUP.
Click the title of that alert there to bring up the edit panel.
Put everything you want people to see in the popup in the description text area box you see there.
For the settings below:
IMPORTANT: To be sure this popup only shows on homepage, be sure that for SHOW POPUP setting, it is set to HOMEPAGE.
Click SAVE at the top right of the page when done. You can change any of the other settings there if you want.