Several years ago, I posted a message on this forum asking how to see full headers. I received a prompt and helpful response, namely, to highlight the message and then choose the three dots and select Full Headers. That worked well, but I just tried it now, and the three dots in the upper right did not yield anything about headers. There were six items: Move to, Change labels, Add star, Mark important, Mute, and Report spam. I had a vague memory of their being dots at the bottom right, but now all there is is a big red circle with a pen in it, for writing and responding. So I have to ask again: how do I see full headers on the messages I've received. I'd like to do so without first opening the message, because I strongly suspect that the message is either spam or malware. The instructions I received several years ago did not require me to open the message first, and I'd like to have similar instructions now, since the old ones no longer work.
Thanks in advance.