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

How to Install QCAD on GNU/Linux Distros

GNU/Linux Installing QCAD Guide

How to Install QCAD in GNU/Linux Desktops – Step by step Tutorial.

And QCAD is a Free, Open-Source Application for computer aided drafting (CAD) in two dimensions (2D).

With QCAD you can create Technical Drawings such as Plans for buildings, interiors, mechanical Parts or Schematics and Diagrams.

How to Install QCAD on GNU/Linux Distros

GNU/Linux QCAD IDE Installation Guide