the address of the image on Twitter's servers. You can also add your current location to your tweets. This is particularly pertinent when tweeting breaking news, travel delays or, as here, photos, as it allows your followers to see at once the location to which your tweet is related. Some Twitter clients, and the Twitter homepage, present this data on a map, allowing other users to find you through the proximity of your tweets to those of others they're already reading. As this could constitute a security risk, both by showing that your home may be empty and identifying your precise location, this feature is disabled by default. To enable it, tap Settings &gt; Location Services and then tap the On/Off slider beside Twitter to set it On. Note that because this feature will only draw data from the device's integrated location features, including GPS, cell triangulation and its IP address, you can't use it to attach an accurate location to an image unless you're still standing at the point where it was taken, despite the iPhone and iPad geotagging images by default. The key, then, is to tweet your images as soon as they're shot, rather than waiting until you return home. Tweeting videos You can't tweet your own iPhone-shot videos, but you can tweet links to YouTube movies through the YouTube app. It's not immediately obvious where to find this feature, though. Start by searching for the video you want to tweet and, having watched it, tap the