3 Right-click the foot and choose Dope Sheet.4 On the Dope Sheet tool bar, turn on Edit Keys if it is not on
already.5 In the Biped rollout, turn on Footstep Mode to easily locate
the track in Dope Sheet.6 Expand the Bip01 Footsteps > Transform track. Notice that footstep 3 extends
for 15 frames, from frames 45 to frame 60.7 Turn off Footstep Mode.8 Select Bip01 R Foot once more.
The keys for the foot are displayed in the Dope Sheet9 At frame 63, set another planted key.10 Turn on Footstep Mode.
The Dope Sheet editor again displays the Footsteps track.
The duration of the footstep now is 18 frames, from frames 45 to 63.11 Turn off Footstep Mode.
12 Close the Track View - Dope Sheet window.
Changing Footsteps Using IK Keys | 759