When you interact with DeltaGUI, you are in fact changing the media live on the server and you can see the changes immediately in the Playback Window, also when you save a Delta show, it defaults to saving to the server PC, not the DeltaGUI PC.
In the example below, Layers editing is selected from the Workspace menu. [Click the labels to find out more.]
Page edited [d/m/y]: 08/12/2020