To open another screen, you use the block under the Control palette called open another screen. This block requires one input, which must be the name of the screen you want to open, in a text block. See Figure 8.3 for the programming that opens Screen2 when a button is pressed.
Screen behavior is like a small deck of cards on a table. You start with just one card, which is Screen1, the first screen you see. When you open another screen, that screen opens on top of the previous one, like another card being put on the deck (see Figure 8.4).