To download the iPEVO document camera application, visit iPEVO.com/support/qa/V4K
Find the “visualizer” tab then scroll down to the “learn more” button.
After selecting “learn more,” select the “free download” button at the top right. 
If you have a Mac laptop, you will require an iCloud account to login. If you do not have one, you will need to make one.
After the download, you can open the Visualizer application.
On the Hamburger menu at the top left, you will be given the option to select a source.
The V4K source is the document camera.