After installing iOS 11 iPad owners will want to familiarize themselves with the redesigned Dock. To access the Dock just swipe up from the bottom of your display at anytime on your iPad. This includes when you're using any apps or from any other screens, like the Home screen.
You can add up to 13 permanent apps to your Dock by using the new Drag and Drop feature in iOS 11. Just drag whatever app you want to the Dock and it will be added for quick access. Continuing to swipe up once the Dock is open will open your Control Center and the new multitasking interface. The Dock also includes 3 suggested apps in addition to your manually added 13. You can disable suggested apps by following these instructions.
You can use the Slide Over multitasking feature in the Dock by performing a long-press on an app icon and dragging up from the Dock while in another app. You can move the Slide Over panel left or right, or swipe all the way to the right to hide it. Swipe left from the right side of your display to recover the hidden panel.
You can force quit any app by swiping up on it from the multitasking screen. You can use a four finger swipe to close multiple apps at once.
If you want to use two apps at once but don't want the Slide Over panel to cover any information, you can move to Split View. Just touch the handle icon at the top of the second app window and drag down to snap it into Split View mode. You can adjust the Split View panes for a 50-50, 25-75 or 75-25 split while in Landscape mode, or 25-75 or 75-25 while holding your tablet vertically.