   Open colormap editor     colormapeditor displays the current
figure's colormap as a strip of rectangular cells in the
colormap editor. Node pointers are colored cells below the
colormap strip that indicate points in the colormap where the
rate of the variation of R, G, and B values changes. You can
also work in the HSV colorspace by setting the Interpolating
Colorspace selector to HSV.  You can also start the colormap
editor by selecting Colormap from the Edit menu.  Node Pointer
Operations  You can select and move node pointers to change a
range of colors in the colormap. The color of a node pointer
remains constant as you move it, but the colormap changes by
linearly interpolating the RGB values between nodes.  Change the
color at a node by double-clicking the node pointer. A color
picker box appears, from which you can select a new color. After
you select a new color at a node, the colors between nodes are
reinterpolated.  You can select a different color map using the
Standard Colormaps submenu of the