GNU/Linux GNOME 45 Enabling System Tray Guide
How to Add/Enable System Tray in GNOME 45 GNU/Linux desktops – Step by step Tutorials.
And by Adding GNOME 45 System Tray Icons you’ll be able to Manage Easily the App Running in Background.

Contents
$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }
How to Add/Enable System Tray in GNOME 45 GNU/Linux desktops – Step by step Tutorials.
And by Adding GNOME 45 System Tray Icons you’ll be able to Manage Easily the App Running in Background.