During the use of the whiteboard, there are two ways to call up the eraser. One is to directly use the back of the hand or palm to touch the whiteboard to call up the eraser; the other is to click the eraser button in the toolbar below the whiteboard to swipe your finger on the whiteboard to erase. In addition; in addition, you can also use the circle selection erasing mode, if you want to clear the full-screen content, you can swipe to clear the screen with one click.