Digikam incorporates a fast imageviewer with a few basic image editing tools. The imageviewer has a toolbar at the top which shows the filename and the current filenumber at the extreme left. To the right of it is shown the current zoomlevel. A number of buttons are to the right of this which provide the functionality for the viewer/editor.

Show previous image
Show next image
Zoom into the image
Zoom Out of the image
Toggle Auto Zooming (if selected image will fit in the window)
Toggle Full Screen (if selected image will be shown in full screen mode)
Rotate the image (through 90, 180 or 270 degrees)
Crop the image to the selected region
Save the modified image
If the image has been modified and not saved you can restore the original image using this button
Close the imageviewer
PageDown
PageUp
1
2
3
Ctrl-C
+
-
B
Shift-B
G
Shift-G
C
Shift-C
Ctrl-S
Ctrl-R
Esc