Question: how to open multiple windows on ipad 1?
Answer: 1) With the app open on your screen, swipe up subtly from the bottom to invoke the Dock. If you swipe at full force, you could minimize your app, so use a light touch.
2) Tap the same app's icon in the Dock.
3) On the next screen, tap the plus sign on the top right.
4) That app will open a new window.