# Miscellaneous features

Noise Ninja includes several convenience features. These are briefly described below.

The Rotate commands in the Tools menu can be used to change the orientation of an image. This is often useful for images that have been retrieved directly from the camera.

The Revert command in the File menu loads the most recently saved version of the active file from disk. This is useful if you want to discard all your changes and start over.

The Save checkpoint and Revert to checkpoint commands in the Edit menu can be used to save snapshots of the image that you can go back to later. For instance, you might want to save a checkpoint before using the Noise Brush, so that you can quickly go back to a known state if you decide to start over with the brush.

The Info Viewer, EXIF Viewer, and IPTC Viewer tools display different types of metadata that might be associated with an image. They can be activated in the Tools menu, or by clicking on the corresponding button in the tool selector palette on the left side of the main window.

The Open profiling chart command can be used to display the calibration_chart.jpg file that is located in the root of the Noise Ninja installation directory.