Use Pen Modes
Whether you are projecting a full screen slide show or using presenter view, you can underline words, draw arrows and circles, or make other marks on slides with the annotation pen to emphasize a point during your presentation. Your marks are erased automatically when you move to the next slide or change the screen to black or white, or you can erase marks on the current slide
Write on a Slide
1. During the slide show, move the mouse pointer to the lower-left corner of the slide > click
icon > choose Pen

2. Your cursor turns into the annotation pen, which you can now use to write on your slides
Change the Color of the Annotation Pen
1. During the slide show, move the mouse pointer to the lower-left corner of the slide > click
icon > choose Pen

2. Move the mouse pointer to the lower-left corner of the slide > click
icon > Pen Color > select a desired color
3. Click the mouse the start annotate on the slide

Erase Marks on the Current Slide
Press E on the keyboard to erase marks on the current slide, for example, to make a different point or to show another connection
