Option to toggle elevation and section lines on/off

Each section line and elevation sign has its own visibility settings in the Edit Levels dialog box. This option enables to toggle all elevation and section lines on/off at the selected level. This function becomes available by clicking on the Parameters > Edit > Visibiliy of Section and Elevation lines button.

Why is it advisable to control the visibility of section lines and elevation signs level by level?

• It is common to create ghost levels for documentation purposes only. It is not absolutely necessary to display section lines and elevation signs here.
• You can easily turn all section lines and elevation signs on and off at the selected level.