PrtScr Assistant can capture screenshots by pressing hotkey once or timer, capture the entire screen, user-selected rectangular area or program window by pressing hot key once or timer.
Moreover, you will also have the possibility to specify the default output folder that will be used for storing the captured images.
PrtScr Assistant Features:
1. copying the entire screen, a rectangular area selected by the user or window selected by the user
2. copied to the clipboard or automatically saved in a graphic PNG-file
3. once the capture an image or capture a timer with a specified interval of user
4. "hotkeys" for capture the entire screen, user-selected rectangular area or program window
5. choose directory to save the graphic files
6. audible indication capture operations

The license of this software is Freeware, you can free download and free use this screen capture software.