Write an article based on this "Make sure that your iPad has a side switch. Open your iPad's Settings . Tap  General. Tap the Lock Rotation option. Press the Home button. Slide up the switch. Rotate your iPad to your preferred orientation. Slide down the switch."
Some older models of iPad have a side switch. When holding the iPad in its vertical configuration (e.g., with the Home button at the bottom of the screen), there should be a toggle switch in the upper-left side of the iPad's housing. If you can't find a switch here, the iPad doesn't have a switch and you'll need to use the Control Center instead. Tap the grey app icon with gears on it. You'll usually find this app on the Home Screen. It's on the left side of the Settings page. Doing so brings up a list of the General options. You'll find this in the middle of the screen, below the "USE SIDE SWITCH TO" heading. This will minimize the Settings app. The switch must be in the up-most position to unlock the screen's orientation. You want to make sure that your iPad is physically rotated to the orientation that you want to use, and that the screen has rotated to fit that orientation.  There are two screen orientations available: Portrait, which is the vertical orientation, and Landscape, which is the horizontal orientation.  Landscape is best for watching videos in full-screen mode or typing into a document, while Portrait is ideal for reading articles or browsing websites. Once the screen's orientation is where you want it, slide the switch down to lock the screen's orientation. You should see a closed padlock icon appear briefly on-screen.  You can change the orientation by sliding back up the switch. Some apps don't support different orientations; for example, Minecraft PE necessitates landscape orientation, while apps like Instagram for iPhone will only appear in portrait mode.