In addition to the ordinary operations such as zooming in and out, the following operations are available in the filtering view:
- Show the original imageTap the leftmost button on the upper navigation bar to go back to the original image view.
- Alter filter to be appliedRed filter, green filter, yellow filter, or blue filter is applied to the image by tapping corresponding button on the segment control in the lower tool bar. The name of filter that is being applied is shown in the center of the upper navigation bar.
- Adjust filtering range and select transform optionsTap the rightmost button on lower tool bar to show a setting view corresponding to the filter that is being applied.