# Normal to Surface

[Normal to Surface] command generates a line that is normal to a surface from the surface point.

## Step 1

For the prompt "Specify a surface", select a target surface

## Step 2

For the prompt "Specify the start point", specify a point on the surface selected in the step 1.

## Step 3

For the prompt "Specify the end point", specify the end point of the line. Since the point is limitted on the normal line ou need to input the point in the other view.

Pressing `B` key specifies the line's end point for the point specified in Step 2 to be the middle of the line.

After the end point of the line is determined, the line is appended on the document.