concept drop - down menu in category scratch

This is an excerpt from Manning's book Hello Scratch!: Learn to program by making arcade games. Login to get full access to this book.

Some blocks are dragged and dropped as is, but other blocks have spaces where you can add other blocks, choose an item from a drop-down menu, or type in a new value. You can change the number 10 inside the Move 10 Steps block by typing in a new value.

Figure 1.6. There are plenty of blocks in Scratch that can be changed by typing new information or choosing from a drop-down menu.

Change the top Key Space Pressed block to Left Arrow using the drop-down menu. Change the bottom Key Space Pressed block to Right Arrow.