featureSelect whether the mockup should show text name-drop, or an image file.
Adds text under the mock up.
Adds a custom image under the mock up.
Image instructions:
Save a .png in Mocko/assets/watermark.png.

Image size should be 1140 W x 285 H

If an image isn't already saved when you tap the image button above, an example image will be downloaded for you. 
text brightnessSelect a tone for the text.
Colors the text white.
Colors the text black.
text opacitySet the visibility strength for the text. Removes watermark/name-drop.