Using K3B in KDE
Note: depending upon your distribution, K3B may or may not be included with the installation of KDE. If it does not appear in the KDE application launcher, you should be able to install it using your operating system's software management system.
To burn your ISO, launch K3B and click "Tools → Burn Image...", as seen in Figure X-XX:
A new window, seen in Figure X-XX, will launch. Click the blue folder to browse to the location of your .iso file.
Once your file is listed, ensure a blank DVD is inserted and click the "Start" button in the top-right corner, and K3B will burn the .iso file onto your DVD.