1. Selection
2. Layers
3. Image size alteration
4. Cropping an image
5. Histogram
6. Noise reduction
7. Removal of unwanted elements
8. Selective color change
9. Image orientation
10. Perspective control and distortion
11. Sharpening and softening images
12. Selecting and merging of images
13. Special effects
14. Change color depth
15. Contrast change and brightening
16. Color adjustment