This is the main display of Impact Texture Studio. At the top you can find the menu options, and below that there are 6 layers you can use to create textures. Layers consist of 3 channels (red, green and blue) and can be mixed, multiplied and distorted with other layers. Channels can also be mixed and multiplied with other channels.

Left click on a menu to activate it, and left click on a menu option to execute it.
Left click on a layer to select it as the current layer (on which all operations are performed).

CRTL-Z is a short-cut to the undo-option.