How to PM someone

I actually got a drop down box when I clicked on your user name and I sent you a test with the title of "test."  

@immatthewj  I don’t get any drop-down box anywhere when I click on someone’s username.  Where exactly on the page was this drop-down box you found?

@soix , on my computer the drop down box appears right next to your username when I click on it.

Maybe it’s because I’m on an iPad and not a computer.

That could be, @soix .  My computer is ancient (2012 vintge) and I am using windows 7, and there is so much stuff that either doesn't work or only works with great difficulty, so I am actually surprised that this did work for me.