You can find any tool by the Menu Structure HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Menu+Structure
You can find the menu location of any tool by name HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Tools+Mapped+to+Menus
Quadrant Point Snap
SEKE: Q
Snaps to the nearest quadrant point (0, 90, 180, and 270 degrees) on a circle, arc, or ellipse. 