Pratial Transparency  / Opacity
This is an advanced feature of the software. When you place different shapes or image on your design, you notice that the top element hides the elements below it. But with partial transparency you can make your top object partially or fully transparent, so the element below it will be seen through. You can make your design elements or your logo or any graphics partially transparent  or opaque  between level 0 – 255. Go to the properties area (in the right side) of any element and use the slider to adjust transparency.   See illustrated picture.

0=Fully Opaque, 255=Fully Transparent