Keyboard shortcuts are combinations of two or more keys that, when pressed, can be used to perform a task that would typically require a mouse or other pointing device. Keyboard shortcuts can make it easier to interact with your computer, saving you time and effort as you work with Windows and other programs.
Most programs also provide accelerator keys that can make it easier to work with menus and other commands. Check the menus of programs for accelerator keys. If a letter is underlined in a menu, that usually means that pressing the Alt key in combination with the underlined key will have the same effect as clicking that menu item.
Pressing the Alt key in some programs, such as Paint and WordPad, shows commands that are labeled with additional keys that you can press to use them
New Windows 7 Shortcut keys
+ ↑ (Up Arrow) – Maximize window
+ ← (Left Arrow) – Snap window to left side covering half of desktop space. Continue pressing the keyboard shortcut will rotate the window between snap to left, snap to right and restore to normal position.
+ → (Right Arrow) – Snap window to right side covering half of desktop space. Continue pressing the keyboard shortcut will rotate the window between snap to left, snap to right and restore to normal position.
+ ↓ (Down Arrow) – Minimize the window. Restore to normal size and position if the window is currently maximized.
+ Home – Clear all but the active window.
+ Space – All windows become transparent so you can see through to the desktop.
+ Shift + ← (Left Arrow) – Move the active window to the adjacent monitor on the left for dual or multiple monitors setup.
+ Shift + → (Right Arrow) – Move the active window to the adjacent monitor on the right for dual or multiple monitors setup.
+ T – Show preview thumbnail of running applications in Windows Taskbar one by one without mouse over.
+ P – Adjust presentation options of the display on computer or projector.
+ + (Add) – Zoom in.
+ – (Minus or Dash) – Zoom out.
Shift + Click a Taskbar item: Open a new instance of that particular application.