Where is "Customize attendee welcome page" for share content to attendee in webinar?

In the past, when creating a webex event, if we create a meeting, we getaddress for attendees: https://kkpfg.webex.com/kkpfg/onstage/g.php?MTID=e971405c6720f4c9e6fb0ed18c3d2db72but it will have Event password included. So I can generate link as below...

            I tested the zoom conference program and found that when I press the record button, there will be a female voice saying RECORDING IN PROGRESS!" for everyone in the room to hear. Which I would like webex to have this option because it will...