# Perpendicular 1

[Perpendicular 1] command generates a perpendicular line to an existing curve.

## Step 1

For the prompt Specify start point, specify a point on the target curve.

- Typing B key, the 1st point becomes a middle point of the tangent, instead of the start point.

- Typing P key changes the mode to the one that the start(or middle) point should not be on-curve point.

## Step 2

For the prompt Specify the end point, specify the end point of the perpendicular.