Working with Mk4tcl has been much more painful than it should be, mostly because the documentation just isn't there.
Better to light a candle than curse the darkness, so here are links to the undocumented commands of Mk4tcl, for myself and other to fill in an explanation as at least a start.
Here the all-caps designation VIEW indicates an instance command representing a view. I would like to have used $view or <view> or even view to indicate this, but that's outside the Wiki formatting rules.
There is a little documentation concerning the above commands at the bottom of the mk/tcl/mk4tcl.h file.
Tom Krehbiel [1]