The keyrange editor allows you to quickly and graphically dispose samples according to their key and velocity ranges. This graph further highlights configuration problems, such as zones free of samples or unwanted superpositions.

Each sample is represented by a green rectangle. The color is semitransparent, so that the superposition of several elements is identifiable. By maintaining the left click you can:

When several rectangles are superimposed, a left simple click changes the selection. Maintaining the right click allows you to change the zoom.