In the Splash Page Editor, your pages are saved automatically every 5 seconds, while you are editing them.
If you want to apply a splash page to an SSID, you need to publish it.
How to publish the Splash page
STEP 1
In the Splash Page Editor click on the Publish button on the top right
STEP 2
Now you can close the Splash Page Editor window and use your new page
How to rename the Splash Page
STEP 1
In the Splash Page editor click on Settings button on the top left
STEP 2
Write the new name of the page in the "Page name" field
STEP 3
Wait a few seconds. The name will be saved automatically. A message will confirm that the change has been successful.
NOTE: Changing the name of the splash page in the editor doesn't change the name of the related SSID.