XS_ZOOM_STEP_RATIO_IN_SCROLL_MODE
Category in Advanced options dialog box: Model views
Use this advanced option to set the zoom
ratio when you are zooming by scrolling and holding down the middle mouse button at the same
time. Enter a decimal value. To zoom more with a single mouse scroll notch, increase the
value. The default value is 0.01
.
This advanced option is user specific and the setting is saved in options.bin under the user folder, for example, in C:\Users\<user>\AppData\Local\Trimble\Tekla Structures\<version>\UserSettings. Restart Tekla Structures to activate the new value.