snap

Software:
3ds max 2017

1. Click the Time Configuration button or right click the animation playback buttons to open the Time Configuration Window.
2. In the Time Configuration window, set Time Display to FRAME:TICKS
3. Right click the timeline and choose Configure > Snap To Frames to toggle the main timeline frame snapping.
4. In the Dope Sheet editor, activate or deactivate the Snap To Frames button to toggle the Dope Sheet frame snapping.