If this option is available, then clicking on the Fingerprint button will open a video capture window very similar to that used for capturing a photograph.
When a satisfactory fingerprint is displayed on the screen, click on the Freeze or Capture button, then move the rectangle to surround the print. Note that this box is of a fixed size and can only be moved, not resized.
Note: your system may have been configured to use the TWAIN device for capturing the fingerprint.
You will only be able to capture a fingerprint if the current badge design has a fingerprint rectangle on it (either visible or hidden).