How many times during any presentation, you might have thought to zoom a portion of the slide , while explaining, or want to draw a line or write or annotate a portion, to stress a point while explaining a PowerPoint presentation. So for all this and much more there's a tool ZoomIt from Microsoft.
"ZoomIt is screen zoom and annotation tool for technical presentations that include application demonstrations. ZoomIt runs unobtrusively in the tray and activates with customizable hotkeys to zoom in on an area of the screen, move around while zoomed, and draw on the zoomed image."ZoomIt has been written By Mark Russinovich.
The Top fig. shows the regular slide, while the bottom one is the Zoomed and marked slide using ZoomIt.
"The first time you run ZoomIt it presents a configuration dialog that describes ZoomIt's behavior, let's you specify alternate hotkeys for zooming and for entering drawing mode without zooming, and customize the drawing pen color and size.
ZoomIt also includes a break timer feature that remains active even when you tab away from the timer window and allows you to return to the timer window by clicking on the ZoomIt tray icon."