It took me awhile, but I finally figured it out -- no thanks to online help!
In Menu Designer, when you click on an object, a slider control appears. The slider control is color coded orange and blue. As you move the slider button left to right, the object fades in, appears fully, then fades out. Where the color is orange is where the object fades in or fades out. Where the color is blue is where the object appears fully. When you hover over the control where orange and blue meet, the cursor changes to indicate that you can move the colors.
So, the trick is to make the color blue span the entire length of the control. First, drag the left side of the blue color all the way to the left. Second, drag the right side of the blue color all the way to the right. Now the control should be totally blue.
To test, drag the slider button the length of the control and verify that the object does not fade in or out. Save the template and apply it to your pages.