There are ten top-level menus in Paint.NET:
Provides access to open, acquire, and save images. These options behave similarly to other document and image editing programs.
Contains commands for easy manipulation of the image history, the selected region of the image, the selection itself, and the clipboard.
These commands change the way that the image or workspace is presented to you.
Contains commands that alter the entire image, including all layers.
These commands alter only the currently active layer.
Contains adjustments which may be used to edit the current layer.
Contains effects which may be used to transform the current layer.
Contains miscellaneous commands.
These commands allow you to hide or show the floating utility windows, to reset them to their original locations, and to toggle their translucent effect.
Provides quick access to this help documentation, the ability to send feedback or a bug report, and access to information about the authors.