Greenshot captures pixels from the desktop and sends the result to an editor or another chosen destination. It can grab a rectangular region, a window, or the full screen. Greenshot does not change the source window or the document shown inside it. The capture becomes a separate image that can receive annotations, enter the clipboard, or save as a file.
Capture shortcuts
Greenshot waits in the notification area and starts captures through hotkeys or its tray menu. Print Screen begins a region selection. Alt plus Print Screen captures the active window, while Control plus Print Screen captures the full screen. Shift plus Print Screen repeats the last selected region, which avoids drawing the same rectangle again when the page or application content changes beneath it.
Hotkeys can conflict with another screenshot program or a keyboard utility. In that case, the key press may open the other program or do nothing in Greenshot. Changing the Greenshot hotkey or disabling the competing handler resolves the ownership conflict; reinstalling does not make two programs share the same global shortcut.
Precise regions
The region selector shows a magnifier and coordinates around the pointer. Holding Shift fixes the current width and height while the rectangle moves. Arrow keys adjust the selected edge by one pixel, and Control plus an arrow moves it by ten pixels. These controls make a repeated interface crop more exact than dragging by eye.
Pressing Space switches the region selector to window capture. This order matters when a context menu needs to remain open: first start region capture, then open or preserve the menu and press Space to choose the window. Starting an ordinary window capture after opening the menu can close that menu before Greenshot records it.
Editor objects
The image editor treats added arrows, rectangles, text boxes, highlights, and obfuscation marks as separate objects while the edit remains open. The user can move or resize those objects without repainting the captured pixels by hand. Greenshot can also crop or enlarge the canvas and place another graphic over the capture.
The mouse pointer can arrive as its own element. It can move to a clearer location or leave the image entirely without recapturing the window. This separation applies to the pointer that Greenshot captured, not to every object already visible inside the original application.
Window details
Interactive window capture can target a top-level window or one of its child areas. Page Down cycles through available child windows when the first outline covers too much of the interface. An application that draws its entire interface as one surface may expose no useful child window, so the region tool remains necessary for a smaller panel.
Scrolling capture appears in Greenshot’s documentation as a legacy Internet Explorer workflow. Do not treat it as a general promise that Greenshot can scroll and combine every modern browser or application. A long web page may still need the browser’s own full-page capture function or several manual captures.
Export choices
After capture, Greenshot can open the editor, save directly, copy to the clipboard, print, or prepare an email action. The destination picker makes this a deliberate choice instead of saving every image to one folder. File-name patterns can insert date and time values into automatic names.
Transparency needs a compatible output. PNG preserves transparent areas, while another image format can replace them with a solid background. JPEG quality settings also trade image detail for file size. Saving a screenshot once in a lossy format cannot restore discarded detail during a later edit, so the output choice belongs before the file becomes the only copy.
