e-mail "select all" checkbox

[sardi]

Ok folks--just got my new LG G4 and have set up two e-mail accts. Supposedly theres a "select all" checkbox to delete ALL e-mails in the acct. I swear I do not have one, but according to users manual, I should. Where the heck is it?. Deleting e-mails individually is a pain

[Snn5]

The stock email app updated not long ago, could have been a few changes.  I can't say for sure because my external security settings are tricky and require 2 step authentication measures, so I don't use the stock email in favor of Gmail app, where I have each address set up a little easier.