Zoom when using RTSP in Xsplit

I use several pan cams to live stream our church service. At first I was unable to use the zoom feature which is dependent on the app. I found that in Xsplit you can select the image and hold down the alt key to drag the box and crop the image. This, of course, will reduce the size of the image to less than full screen, but when you release the alt key and again grab the edge and drag it to full screen it remains cropped. The result is similar to having zoomed in.