This will set the tangents of your selected keys
in the trackbar. It's pretty easy
keys in the trackbar or trackview
(however the whole point of it is to change your keys without opening
your trackview) and click on the tangent you want. That's it.
It also has options to choose whether you want to change only
incoming or outgoing tangents.
you to choose between the normal vertical alignment that can dock on
the left and right of your screen and the new horizontal layout that
can dock on the top and bottom.
Just extract the zip files to your 3dsmax root folder and make sure
that the 'use folder names' option is turned on.