generalzod
I assume you are talking about deep sky objects. You can zoom the image on the screen using whatever finger combination is required on your phone or tablet. However if you save the image, it will revert to its natural size depending on your telescope focal length and camera resolution.
If you are doing lunar, planetary, or solar, the Video mode does allow you to zoom in depending on the resolution you choose in video mode. When you save that video, it will retain the increased image size.
JohnD