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.
Some pages are active departments with their own set of instructions. It may be tempting to skip reading them and go straight to making edits or leaving messages. But this just clutters those pages and creates unnecessary steps for the volunteers of those departments. This happens a lot at the Help desk, the Wikipedia:Reference desk, and at Articles for creation. For example, many users ask general knowledge questions at the Help Desk rather than at the Reference Desk, because they didn't read the instructions at the top of the page. If you visit those pages, please take the time and read the instructions before making use of those helpful departments.
