For zooming in or out do one of the following:

• click the Zoom In or Zoom Out button in the toolbar
• drag the slider in the Navigator
• use the zoom commands in the View menu

To view another area of an image, do any of the following:

• use the window scroll bars
• drag the red box in the Navigator
• press right mouse button over an image and drag to view another area of it

For selection a region of interest(ROI), click the left mouse button in any corner of the ROI and drag to the opposite corner (see the picture). Then release the mouse button. If the selection is successful (looks like the one in the picture), you will see measurement results immediately in Plot panel and Main panel. If not, you will see the corresponding warning or error message. For evaluation version any successful selection will decrease number of available edge analyzes, do not forget it please.