Erasers remove all or part of the drawing in fun ways. Erasers range from large to small. Select the Eraser tool, the size of eraser from the Option bar and erase part of the drawing. Select other options and click on the screen to watch the whole picture disappear. Try pressing your option key while erasing and see what happens.
Text places letters, numbers and symbols at any place on the screen.
Select the Text tool, click on the letter chosen, then click on the screen to place the letter. Position the pointer on the screen where the letters should begin and click. Type the text desired. Stamps place pictures on your slide. There are many sets of stamps on the Options bar.