improve mlab.load docstring to address bug 1901536
improve docstring for mlab.load to clarify for bugreport 1901536
fix marker placement bug in backend_ps
Lots more docstring formatting.
start of a menu widget
added a note to self
Make legend less hacky looking, with a "cute" math expression.
added origin support for composite images
Removing redundant cla() method. (Thanks Tony Yu).
Fix bug: [ 1978629 ] scale documentation missing/incorrect for log
