For searching in the digitized image catalogue you have to select required letter from the alphabet. In the left part of the screen a list of the catalogue cases will be displayed. (This may take some time).
To select the list of subdivisions double-click its heading or "+" sign.
After selecting a required sub-divider in the second column a list of catalogue cards will be displayed.
Now you can browse catalogue card images by selecting them from the list of by clicking the navigation buttons ("previous", "next"). Also, you can click on an image to open it in a new window. (You can still continue browsing images).
You can zoom in or zoom out the card image by clicking buttons in the upper part of the screen window.