There is a little half moon that appears in Facebook chat next to a persons name. When the moon appears, it means that the person is idle at that time and is not active.
The little moon on Facebook signifies that you have activated the "Dark Mode" feature, which changes the background of the app to a darker color scheme. It is an option for users who prefer a darker interface for reduced eye strain or aesthetic purposes.
I had sex with a man once.
don't do anything on facebook for about ten minutes and a little moon will appear to your friend when they look at you on chat. the moon means you haven't done anything on facebook for a while even though you are still online. it also means idle or away
it means there idl(away etc..)
It means that the person is still logged into Facebook, but is idle (hasn't refreshed the page or made any actions on facebook) in the last 5 minutes or so.
The moon icon dissapears on facebook when clicking on something; then the icon dissapears
The little square one sees when talking on Facebook is en emoticon or smiley that can't be displayed. This is usually the cause when a person uses to text from a cell phone on Facebook.
That is because you are not always on-line or you come on-line once in a blue moon.
maybe they are online
It only means that there is water on the moon, it could be in frozen or little quantity.
It means that the person has Facebook pulled up on their computer, but they haven't done anything on it for 10 minutes or more. It usually means that they have left their computer or it is minimized.
I think you mean for you DSi if you do go to the camera app and touch album, select the picture you want and click the little button that has the facebook symbol.
It means the person you sent the message to - has seen it.