I seen in other thread that you built cabinet, you want to get rid of the side art you mean.
Some machines depending how big they are you can go into design then edit mode and drag the side across, save the layout when exit.
Others that are bigger layouts, design then edit mode, right click on blank part, menu comes up, it says window size near the bottom you have to say custom, then basically you have to keep guessing until you get the right resolution of the machine without the border.
Borders on the left can't be removed yet with the emulator, but I think Wizard is sorting it out in next version.