Computer Technology

1. The Hand Tool 
Key combination: Hold Spacebar
Simply hold the spacebar to  temporarily change your current tool to the Hand Tool. You can then pan  around your entire image and continue working with your current tool at  your desired area. EPIC!
2. Apply Levels 
Key combination: Ctrl+L
Levels is one of the most powerful  editing tools in photoshop. You can use it to remove colour casts, add  extra warmth and boost the contrast of your images. If you want  photoshop to adjust the levels for you automatically just hold down  Shift+Ctrl+L.
3. Hiding the PalettesKey combination: Tab
Ever wondered how you can remove the  numerous on screen clutter? The endless boxes and palettes on photoshop  maybe distracting and cluttering your image. Simply hit Tab to hide  them, to bring them back just hit Tab again.
4. SavingKey combination: Crtl + S and Ctrl + Shift + S
A must know for every designer who  has experience crashes on photoshop. Ctrl + Shift + S is a save as  function whereas Ctrl + S is used to initiate a basic save.
5. Undoing Multiple Steps Back 
Key combination: Ctrl + Alt + Z
A known fact in photoshop is that  Ctrl + Z allows you to undo once. But in many instances we do need to  undo or step back more than just once. Ctrl + Alt + Z allows you to do  just that. Nifty Trick!
6. Abort AnythingKey combination: Esc
Applied an effect that’s taking ages  to apply and you realised that it’s not the one you want? Don’t like the  selection you have initiated? Hit Esc on the keyboard to go back to  your image.
7. Sizing Image to fit on screenKey combination: Double click on the handtool
The handtool is found in your toolbox and will zoom your image to make it fit onto your screen.
8. Zooming In and OutKey combination: Ctrl + and Ctrl -
Zooming in and zooming out is used  frequently to check the fine details of your image making sure there are  no silly errors. These shortcuts is extremely useful when you have a  filter or some other panels opened whereby the zoom tool is not  available via the task bar. With this short cut, you will still be able  to zoom in or out. The key combination might be in a weird location but  hey, it’s a real useful shortcut.
9. Viewing an image at 100%Key combination: Double-click on the zoom tool or Ctrl + 1
As we polish our work, from time to  time we will need to check how the image is turning out on a 100% view.  There are multiple ways to do this but one of the easiest way would be  to just double-click on the zoom tool or to hit Ctrl + 1 on your  keyboard.
10. Change the brush size 
Key combination: ] or [
When you are using the brush tool or any tool that uses brushes, you can  adjust the size of the brushes by using using the square bracket keys. 