I see the downvotes. Unfortunately, I have no spam at this time so a screensnap would be useless because people would say the option shows up only when there is spam. What a time not to have spam!
And I can't believe anyone here would be snotty enough to downvote because I used the term "advanced." From what I remember, I am using GMail as it originally was because people complained about this at the time. I can Select All for delete spam in YahooMail. Adding this to GMail would be trivial. And this HTML mode is what people have to fall back to when the "standard" GMail is not working.
EDIT: I had to change the snaplink.