Yuneec camera E90 is capable of digital zoom. Digital zoom is an ideal tool for many types of inspection, or getting a closer view of objects further than the camera is able to originally see. Digital zoom and optical zoom differ, as optical zoom uses placement of lenses to generate a closer image where digital zoom enlarges pixels.
When using digital zoom, some loss of fine detail is normal and expected.
Pinch the screen to zoom, just as with any other mobile device. Depending on distance, there may be a small amount of latency in seeing the image zoom.