You can customize images in MenuBuilder so they contain as little or as much transparency as you want.
Open the MenuBuilder project.
Double-click the image to edit.
The Image Properties dialog box appears.
Select Transparent background to make the background color of the image transparent. (The image itself does not become transparent.)
Select Transparency to make the image itself transparent. Select a value from 0% to 100%. (0% is completely opaque and 100% is completely transparent.)
Click Apply to view your changes without closing the dialog box, or click OK to accept the changes and close the dialog box.