The command activates the Section funcitonality: this is a powerful tool to see, evaluate and measure the models open in Bly.
Here below you find the panel's functions description.
Reverse direction
It flips the section's plane normal (axis), reversing the section's side.
Original section
Reverse section
Specify section's normal (axis)
This option specifies a section axis via AxisSelection panel
Specify section's origin (point)
This option lets you select a point the section plane pass through.
Save
It creates curves retracing section edges. Curves are objects that remain visible if the model isa blank (see picture) and can be then exported (see below)
Export
This option exports section curves previously created in a bly file that can be reopened afterwards.