This script allows you zoom in/out timeline much more comfortable. Works for curve editor also. You can start script when You need by drag&drop it to 3ds Max interface, or by Utilities.
Current version: 1.0.
System requirements : 3dsmax from 2012 to 2017
Zoom button – On/Off (+10 – 10 frames by default)
Number and Slider: Half of active Timeline zone for Zoom (± from current Time)(Pro only)
Set Middle: Move active Timeline zone rather current time (current time will be middle of active timeline zone)(Pro only)