KSnapshot grabs an image of your entire desktop immediately after it is started, but before it displays itself on screen. This allows you to quickly create full-desktop screenshot images.
The snapshot taken by KSnapshot is displayed in the preview window, which is located in the upper center of the KSnapshot application window. Below is an example of the preview window from KSnapshot Your pre view will differ depending on what you have displayed on the desktop.
The snapshot displayed may be saved immediately by clicking on the Save button. The filename that the snapshot will be saved under appears in the Filename box. If multiple snapshots are taken, the filename is automatically incremented to prevent you from overwriting previous snapshots.
To take a snapshot of a single window, enable the Only grab the window containing the pointer and then click with the left mouse button in the window you wish to capture. KSnapshot will display the new snapshot in the preview area, at which time you can choose to save the new image (by pressing the Save) or to grab a new one, by pressing the Grab button. This is KSnapshot's default behavior.
To take a new snapshot of the entire desktop, uncheck the Only grab the window containing the pointer option. KSnapshot will now capture the entire desktop if you press Grab.