Notes:

Photoshop Menu Bar

Menu bar is one of the most important Photoshop UI element, appears at the top of the application.
It contains various menus like: File, Edit, Image, Layer, Type, Select, Filter, 3D, View, Window, and Help menu.
Every menu contains set of commands respective to its name. Every command in Photoshop has a name. Some of the commands have name as well as an associated keyboards shortcut. If you want to become a professional designer then you must and should remember keyboard shortcuts. Because they help you to achieve some tasks quickly, and save a lot of time.

File Menu:
New… Ctrl + N
Open… Ctrl + O
Close Ctrl + W
Close All Ctrl + Alt + W
Save Ctrl + S
Save As… Ctrl + Shift + S
Save for Web… Ctrl + Shift + Alt + S
Revert F12
Print… Ctrl + P
Exit Ctrl + Q

Edit Menu:
Undo / Redo Ctrl + Z
Step Backward Ctrl + Alt + Z
Step Forward Ctrl + Shift + Z
Cut Ctrl + X
Copy Ctrl + C
Paste Ctrl + V
Free Transform Ctrl + T
Preferences Ctrl + K
Color Settings… Ctrl + Shift + K
Keyboard Shortcuts… Ctrl + Shift + Alt + K
Menus… Ctrl + Shift + Alt + M

Image Menu:
Auto Tone Ctrl + Shift + L
Auto Contrast Ctrl + Shift + Alt + L
Auto Color Ctrl + Shift + B
Image Size… Ctrl + Alt + I
Canvas Size… Ctrl + Alt + C

Layer Menu:
New Layer… Ctrl + Shift + N
Duplicate Layer… Ctrl + J
Group Layers Ctrl + G
Ungroup Layers Ctrl + Shift + G
Merge Layers Ctrl +E

Select Menu:
All Ctrl + A
Deselect Ctrl + D
Reselect Ctrl + Shift + D
Inverse Ctrl + Shift + I

View Menu:
Zoom In Ctrl + +
Zoom Out Ctrl + -
Fit on screen Ctrl + 0
Actual Pixels Ctrl + 1
Extras Ctrl + H
Rules Ctrl + R
Lock Guides Ctrl + Alt + ;
Snap Ctrl + Shift + ;
Screen Modes F

Window Menu:
Brush F5
Color F6
Layers F7
Info F8
Actions Alt + F9

Help Menu:
Photoshop Online Help… F1