Update updates the current list of windows in the Windows pad. When a window in the Windows pad is clicked, its components (if any) are displayed in the Components window.
Format allows the user to select the format of the image file to be written. Image files may be created in the formats written by the Java Advanced Imaging Toolkit (.bmp, .jpg, .png, .pnm, .tif) as well as Postscript. The JPEG Quality textfield only appears if jpg is selected as the format. 0 is the lowest quality, 100 the highest.
Save writes the image file named in the Save to File text field.
On some platforms, if an OpenGL application is covered by another window, the resulting image created by SnapShot will only show the uncovered portions of the OpenGL window.
On the Solaris platform, capturing an OpenGL window sometimes results in a very faint image. An unreliable workaround is to change window managers, but this problem has been seen under the CDE, AfterStep, and Enlightenment window managers.
Sometimes an extra wide border appears around the image.