In Microsoft Windows, a screenshot of the entire monitor, complete with taskbar, can be copied to the system clipboard by pressing the Prt Sc key. Alternatively, pressing Alt+Prt Sc will copy just the active window to the clipboard. You can then paste the clipboard into a program like MS Paint or Paint.NET using Ctrl+V, and then save it as an image file (for uploading to Wikipedia, for instance).
In Mac OS X, simply prepare your screen to how you want it to look, then hit ⌘ Cmd+⇧ Shift+3 (not the number pad 3) simultaneously. The new image will appear as a PNG on your desktop. Additionally, if you only want to capture part of the screen, you can hit ⌘ Cmd+⇧ Shift+4, click and drag over the part of the screen you would like to capture and release, also saving it as a PNG on your desktop.
To add this auto-updating template to your user page, use{{totd-tomorrow}}
Today's featured picture
The six-spot burnet (Zygaena filipendulae) is a moth of the family Zygaenidae. It is a common species throughout Europe, except the Atlantic coast of the Iberian Peninsula, northern Scandinavia and the Great Russian North, and is also present in Asia Minor, through the Caucasus to Syria and Lebanon. It inhabits meadows, woodland clearings, sea-cliffs and area rich in grasses and flowers, up to 2,000 m altitude. The adults fly on hot, sunny days and are attracted to a wide variety of flowers such as knapweed and scabious, as well as the larval food plants bird's foot trefoil, Dorycnium, Coronilla and clover. This six-spot burnet was photographed in Kulna, Estonia.