When you are using GeoFill, the source pixels are displayed in the polygon you have drawn only. That is, the pixels displayed are those that have been copied and you will later paste. However, at times it is helpful to instead show all of the source image temporarily. By doing so, you can more easily determine, for example, if you need to increase or decrease the size of the polygon.
Figure 1. Source Clipping
To view the source clipping
- On the GeoFill toolbar, click and hold Source Clipping.
All of the source image is displayed for the duration of time you hold down the mouse button. To go back to viewing the source pixels constrained in the polygon, release the mouse button.