Hide tray icon option about monitores HOT 7 CLOSED

Could you please little elaborate about the expected behavior?

I don't completely understand what you mean, but you probably want some 
detailed explanation.
I want an option in Settings to hide tray icon on startup, so when the program 
starts it doesn't show icon i tray. And to show that icon again, you just have 
to run the program second time. You already implemented a detection so that 
only one instance will be running. Just add checking, if tray icon is hidden 
then display it.
Or another way is to add an option to set hotkey to displaying tray icon or 
just Preferences window

[deleted comment]

That's clear now.I am adding a Hotkey support to show preference window. Quick 
way to access preference. Thanks for the suggestion.

Added customizable hotkey to open preference window.It will be available in 
Next release

What about hiding tray icon ?

Yes, Including that as well. Thanks for you suggestion/Idea