Wikipedia:Tip of the day/March 17
Have you ever added an example image to a page, only to have it removed and receive a warning? Here's a solution. If you want to test some unfamiliar wiki-markup, or practice image placement, head to the Sandbox, where you can test to your heart's delight (or you can create your own sandbox for more demanding tests).
Or open your own sandbox by clicking on "Sandbox" on your user menu at the top of the screen.