* sub-groups, which may have their own colour schemes). A null value is used
* for no residue colour (white).
*
+ * BH Note: It is critical that any call to
+ * AlignViewportI.setGlobalColourScheme is followed closely, if not
+ * immediately, by a call to AlignPanel.repaint(true, true) so that the
+ * overview is updated. When that happens, the sequence overview color caches
+ * are cleared.
+ *
* @param cs
*/
void setGlobalColourScheme(ColourSchemeI cs);