Hi Still getting started, so need to ask how to send a PM. Yes, I did look at the Help section, but couldn't find any mention. Not saying there isn't one - I asked the CBF forum about fitting hazards, having failed to spot the existing switch on the R/H bar(!), so I'm used to the red-face emoji. Thanks
Click the little envelope icon to the top right of the page. It's between your little profile pic and the alerts icon.
You can also do it by clicking on the user avatar to the left of every post. You will see an option "start a conversation" obviously with the user you have clicked.