Open your project (= output from the tomograph) in ArborSonic 3D program → click on the folder icon in the top left “Open project” (1)
Switch to bookmark “Tomograms” (2)
Choose a colour scheme (3) and set the value “Purple_Red_Yellow_Discrete”

it's the lower scale
<aside> ⚠️ Attention! Purple_red_yellow you have two values to choose from, you need to select the one that is written Discrete
</aside>
Choose a layer ⇒ layers are individual tomographic scans, so the following steps need to be performed for each of them
Set display on 2D map (5)
Take a screenshot of the whole tomogram including the scales → it should look like this: