Duplicating Tabs and Other Alt D Shortcuts

There is no direct tab duplication shortcut as of yet. There is however a trick you can use to duplicate your tabs with the keyboard

Alt + D + Enter
First, hold down the alt key. Then press "D" followed by enter.
Alt + D will select the current url in the address bar.
Alt + Enter will open a selected url in a new tab. (Alt + Enter with nothing selected will bring the window into fullscreen mode. This can be reversed with F11 or by pressing the keys again.)

Other
(Alt + D) + (Ctrl + C) will copy your current url.
(Alt + D) + (Ctrl + V) + Enter will paste a selected url into the bar and go

Alt + D + Backspace/Delete will clear the url bar. Useful to use as a quick search bar, as you don't have to take your hands off the keyboard. (You dont even have to press backspace, as once you start typing, it will clear any text already there.)

Alternative Options

The alt key can be a quite helpful addition for anybody to learn how to use, especially for someone who deals with menus and windows every day. It can make accessing certain areas and menu options much faster and this can really speed up doing simple things.
Not only do these not take long to incorporate, there are a bunch of additional variations for you to play with and use.

1) Alt + Left/Right Arrow key
This will send you back one page (left) or send you forward one page (right). This is useful if you follow a link, and then want to go back to the link's source. You could also use it to flick through the web pages you have visited throughout the day, to see where your time went.

2) Alt + Tab
If you have many windows open and you want to find one window in particular, this little shortcut is the key. You use this scroll through the programs you have open and pick out the one you need.
Extension: If you have too many windows open, and want to shut down everything, hold down the alt key and alternatively press tab and F4. This will close every second window. Repeat this until every window is closed.

The XP Alt Tab display

3) Alt + Space(bar)
This will bring up the system menu for the current window. From there you can press variously alpha keys to change the window size, shape or close it. On a full QWERTY keyboard there is a nifty key for this, just right of the Alt Gr key and left of the right Ctrl key.
Here is a list of some of those keys

• C = Close
• N = Minimize
• M = Move
• X = Maximize

Try them out, and you might find one that might be useful for you. (C is useful for me to close some windows)

4) Alt + Code
With the alt key you can produce special characters such as ♥ ◙ ╦
To produce them, hold down the alt key and on the right number pad type in the code. (It won't work on the number line above the alpha keys
For example

• Alt + 1985 = ┴
• Alt + 3 = ♥
• Alt + 666 = Ü

Here is a fuller list of the codes. There are plenty more, and you can have a go at trying random combination to see what you get. Another good place is here, and it has an even longer list.

5) Alt + F4
This was mentioned above, and I am just pointing this out to help you avoid tricks. Alt + F4 will close your current window, and if you are on the desktop, it will bring you to the shutdown menu. Sometimes, you are told to do this and it will do x trick, or will open x page. When you see this, don't fall for it and press them. It will close your window, and you will have to spend time re-opening your window.
An example of this is on MMORPGs where a newb or n00b (new person to the game) will ask how to do something, and this is be the response. The n00b then disappears and its lols all round.

Are you a n00b?

Have fun trying out the different shortcuts and see if you can find other ones. Feel free to contact me with any queries