In order to make the background visible while using a hotspot you can do the following:
1. Add hotspot.
2. Choose function and add content (e.g. image).
3. In the colour section you can now adjust the transparency of your hotspot.
4. Adjust the transparency by moving the slider.
If you have odd-sized images, we recommend making these a .png file format and also making the background transparent. (Note: This needs to be done before the file is uploaded to Prezentor.)
Using transparency can also help when you want to hide lines (1px) in case an image doesn’t have the intended size for a slide or hotspot.
See also: What is a hotspot and how to work with it?