Menu Locator: Media List Editor > Tools .
Gradient Image Creator allows you to quickly create two color gradient image files. They are standard format image files so you can use them with other apps as well if needed.
Once you create an image file then Load/Play it on a Media Screen, .Net will lock the file from further changes until Video Mill is closed (which unlocks the file). You will get an error message trying to re-save to the image file when it is locked (ie. 'File In Use' message). In this case, just save to a different filename. For example if GradImage-1.png is locked, save to GradImage-2.png.
You do NOT need to make the size the same size as the target display, since there is a Stretch Style = Fill setting in the Video Geometry panel (Figure 2) of the Media List Editor. Also check the Fit to Media Screen checkbox (Figure 2) to make a smaller image stretch to fill the entire display. In our testing, even a small gradient image (ex. Width=16, Height=16) makes a surprisingly smooth gradient on a 1080 display when stretching the image. A gradient image matching the display size (ex. Width=1920, Height=1080) made no discernable difference when displayed on a media screen. A smaller image saves disk space.