In addition to capturing the entire window of the target program, you can also record part of the screen capture area to the frame as a separate image without interrupting capturing flow. The target program freezes up in this mode.
Press Shift-PrintScrn combination to enter the special capture mode. The target program freezes up and in addition to the red you will see the blue enclose frame indicating special capture mode.
Modify size of the special capture area by dragging border and press PrintScrn.
The content within blue area will be captured on the current frame as a separate image. Use Identifier dialog to modify image identifier before saving (remember, that identifier should contain only Latin alphabet letters, numbers, and underscore character).
Use the same technique for "cutting" any number of the images from the current captured screen, by sequentially changing size and location of the blue screen capture area and by pressing the PrintScrn.
After you finish "cutting”, you can return to the regular capture mode by pressing Shift-PrintScrn. The blue enclose frame will disappear and captured program will unfreeze; also PrintScrn button will continue capturing the entire area.