Include a background custom image on the Portal page.

[gbrenes]

Under Work Centers -> Guest Access -> Portal & Components -> Sponsor Portals  -> Portal Page Customization, you can set a Background Image for the portal.

Right now, it only uses the manual size that you have saved the image as. 

Also, if it is too small, it will tile the image, instead of just have one image. 

If trying to stretch, or fit the background image for every sponsor portal configured, no matter the resolution it will tile the image. 

[Surendra · Accepted solution]

It works with custom themes. The default themes do not support the background image property customization. You can find how you can customize the theme using https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/4561-docs-security/5013/1/How-To_43_ISE_Web_Portal_Customization_Options.pdf

[Jason Kunst · Accepted solution]

you can also try this out

Anyway you could try to insert this style for "Optional content":

1. Open field by clicking on "Toggle to HTML"

<style>
[data-role="page"] {
    background-size: cover !important;
}
</style>

2. Close field by toggling.