You can zoom in a schedule to make it easier to read small fonts in a large schedule view.
Hold down the CTRL key and use the mouse wheel to zoom in and out.
You can also hold down the CTRL key and use + / - to zoom in and out of a schedule. As you zoom in and out, the zoom level percentage displays in the lower right corner of the drawing area.
To return to the original zoom level (100%), hold down the CTRL key and press 0.