Click on the key image cursor mode button, 
, in the toolbox toolbar. The cursor changes to a paper clip.
Position the cursor over the image you want to save, and click the left mouse button. The key icon appears in the top left corner.
To save the presentation state of a key image and attach it to the report, do the following:
Click on the key image cursor mode button, , in the toolbox toolbar. The cursor changes to a paper clip.
Position the cursor over the image you want to save, and click the left mouse button. The key icon appears in the top left corner.
Make changes to the key image presentation state from the report panel. Changes made to the original image do not change the key image.
To save the image as a second key image, modify the original image's presentation state. The icon in the top left corner of the original image changes to a paper clip, indicating the image in the frame no longer matches the one in the report panel. Set the cursor to key image mode and click on the image again. In the report panel, two images appear, each with their individual display characteristics.
To automatically create a key image when annotating an image, set the Generate Key Image setting on the Auto PS tab in the Customize Settings panel, and select the annotation tools. The key image is created automatically when the user adds a selected annotation to an image. By default, this feature is disabled.