Gwenview has a few features which are available in both Browse, View, and Full Screen view. Gwenview has the capability to do basic alteration of your images.
Rotate: A rotate operation will rotate the image either to the left or to the right, depending on whether you do → (Ctrl+R) or → (Ctrl+L)
→ : This operation will reflect the image along the vertical axis, as if you were seeing it in a mirror.
→ : This operation will reflect the image upside-down (a reflection along the horizontal axis)
→ (Shift+R): This operation will allow you to shrink or expand the image. Note that if you increase the size of an image, it may appear blurry and/or pixelated.
If you have installed the Kipi Plugins, a menu will be available that will allow you to perform many additional operations on your images. For more information, see the Kipi Plugins documentation.