This question already has an answer here:

Before being edited this answer was suggesting that elementary OS does not have a system tray.

I would like to know more about this. What is the difference between this and what I see in other desktops like Xfce etc and why some apps don't show an icon here when they should, while others do.

enter image description here

marked as duplicate by Daniel Foré Apr 13 '16 at 16:13

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • please comment when down-voting and i'll try fix what's wrong – user170 Mar 15 '16 at 10:31
  • Don't call elementary OS eOS. I have done the changes for you but take a look @ elementaryos.stackexchange.com/questions/850/… – Suici Doga Apr 13 '16 at 13:08
  • I have renamed eOS to elementary OS in all the posts I could (some contain eOS in uname output) – Suici Doga Apr 13 '16 at 13:14
  • @SuiciDoga - Why is this important? are there some rights involved? I personally would like to see eOS used for elementary, like one says MS for Microsoft, Mint or LM for Linux Mint etc – user170 Apr 13 '16 at 15:07
  • Did you read the link? – Suici Doga Apr 13 '16 at 15:51

That is a System Tray, and the answer you link to is somewhat contradictory.

elementary OS does not have a system tray
Currently (in 0.3 Freya), only the Ayatana Indicator API is respected.

Ayatana Indicators do exist in a system tray in Freya, however they will not in Loki.

  • I suggest you comment the linked answer and argue the OP to clarify. – user170 Mar 12 '16 at 21:00
  • I have appended an edit for clarification. – Lewis Goddard Mar 12 '16 at 21:03
  • This answer is not really accurate. System Tray is the actual user-facing name of the GtkStatusIcon API. The Ayatana Indicator API is never referred to as a "system tray". They are pretty different APIs in terms of the things they allow. – Daniel Foré Apr 13 '16 at 16:14