$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install Xev on CentOS GNU/linux Distro

GNU/Linux RHEL-based Installing Xev Package

How to Install xev Package on RHEL-based GNU/Linux desktops – Step by step Tutorials.

And the Xev CentOS Tool creates a Window and then asks the X server to Send it Events whenever anything Happens to the window (such as it being Moved, Resized, Typed in, Clicked in, etc.).

Finally, this Setup is Valid also for All the others RHEL Based Distros like:

  • Red Hat Enterprise Linux
  • Oracle Enterprise Linux
  • Rocky Linux
  • AlmaLinux
How to Install Xev on CentOS GNU/linux Distro

CentOS Xev Installation Guides