I have read the FAQ for the DxO fora. However, I do not find a screen shot of the general web page (with the magnifying glass from which I did a search on this topic); thus, although I have hunted with the screen pointer, I cannot find a “logout” button or menu item. I do not like leaving sites logged-in when I am not actively using the site – memory leaks and account login mischief can happen.
Thank you. Does the @sgospodarenko work here as it does on some fora to get a “personal” message to the person? Or is it this reply mechanism (that does have pop-up balloons for most of the action icons)? Take care. Stay safe.
When you toggle a person with @ - the user will see extra notification that his attention is required. To write a personal message you can use 
(Message) icon.
Regards,
Svetlana G.