To manipulate the footstep keys, you'll use Track View in Dope Sheet
mode.2 On the 3ds Max menu bar, choose Graph Editors > Track View - Dope
Sheet.
The Dope Sheet opens.
3 In the controller window, expand the Bip01 Footsteps > Transform track,
and click to highlight it.
You should see the footsteps in the keys window.
4 Right-click the top of the Track View window and choose Dock > Bottom.
The Dope Sheet moves out of the way of the viewport.5 Make adjustments as needed to your viewport so you have a clear view
of the footsteps and the biped. When you select footsteps in the viewport,
you also select footstep keys in Dope Sheet.
6 Select footsteps 4–7 in the viewport, if they aren't already selected.
In the Dope Sheet, the selected keys appear in a brighter color, with white
dots on them.7 Hold down the ALT key and click the white dot at the left side of footstep
key 4. This deselects the left side of that footstep key. Repeat for key 5,
deselecting the left side of the key.
Keys 4 through 7 are selected, but keys 4 and 5 display only one white
dot.
8 From the right side of key 5, drag to the right so the key ends at frame
200.
9 On the keyboard, press ALT+R to extend the animation to match the
footstep keys.
Making a Biped Stop and Start Walking | 751