Showing Write Speed in CDspeed with BenQ1620

On some scans i see that cdspeed shows the write speed of discs, i have this option ticked in CDspeed but it doesnt show the write speed of the disc how do you get this to show, I am using firmware B7T9.

I believe you have to create a test disc with CD/DVD Speed and straight after it finishes run the disc quality scan and it will import the write speed graph from the previous window.

You don’t have to do it immediately, the info is recorded on the dvd.
By checking the option Burn image file in CD Speed, you can use ISO or NRG images to create the data disc for the test, so you don’t have to waste media.