Transparent backgrounds for the products make more sense since they would make things look cohesive, as opposed to the images ...

The solid white background visible earlier should ... This way, you can easily add a transparent image over a screenshot with Microsoft Paint and turn it into a watermarked image.

Right-click the shape and select Format Picture from the context menu. A Picture Format dialog box will appear. On the Picture tab, under Transparency, drag the Transparency slider or click the ...