XS_ZOOM_STEP_RATIO
Category in Advanced options dialog: Model views
Use this advanced option to set the zoom ratio for the Zoom in and Zoom out commands on the View tab. To zoom more with a single mouse click, increase the value. The default value is
0.25.
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.