Undo
Mira provides Undo capability through several implementations of the Undo command:
The Edit > Undo command in the Edit menu.
The Undo button on the Image Toolbar.
Some dialog windows also have Undo buttons as a convenience.
This command also uses the standard keyboard accelerator Ctrl+Z.
For Image Windows, Undo has two options; they can restore the previous state of one image or the entire image set. When the Image Window contains an image set, you control the operation using the (Process Image Set) button.
With the button pressed, Undo applies to the entire image set.
With the button released, Undo applies only to the current image.
Undoing an image set is especially powerful. For example, you might register a set of 30 images, then use Combine Image Set to average them into a single, high signal-to-noise master image. Upon inspecting the new master image you might find that the registration was not as good as you had thought. Since Combine Image Set places the new image into a new window, the Image Set that you registered still exists (unless you closed it). To reverse the registration and try again, be sure is pressed, then execute Undo (you can determine the button state by reading the pop-up Tooltip for the button). In this example, Undo would restore all 30 images to their pre-registered state.