Photoshop shortcuts

1. Apple+U: Hue and Saturation
   
2. Apple+T: Free transform
   
3. Option+Delete: changes color of image to your background color 
   
4. Apple+J: Duplicate layer 
   
5. Apple+E: Merge 
   
6. Apple+F: run the last filter 
   
7. Apple+Z: undo 
   
8. Apple+X: cut
   
9. Apple+C: copy
   
10. Apple+V: paste  
    
11. B: brush tool
    
12. D: sets swatches to default 
    
13. Apple+A: select all
    
14. Apple+S: save 
    
15. Apple+N: new document 
    
16. Apple+click layer: put selection around text
    
17. Ctrl+click layer: rasterive layer
    
18. X:  swap swatches 
    
19. T: type tool
    
20. Apple+D: deselect 
    
21. Apple+F: run last filter