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1/ Command :

• MID

2/ Description :
This tool draws a horizontal center line precisely between two　selected lines (or polylines).

• Automated Midpoint: Calculates the midpoint between two vertical or near-vertical lines to draw a horizontal bisector.

• Auto-Layer: Automatically places the line on the CENTER layer.

• Compatibility: Works with both standard lines and polylines.

• Input: Requires　selecting two line objects sequentially.

3/ How to Use :

1. Type mid in the command line and press Enter.

2. Click the First Line.

3. Click the Second Line.

4. A center line is automatically drawn horizontally between the two lines on the CENTER layer.

• Note: This specific LISP might not include the layer creation routine itself, so it's recommended to use it within an environment where the CENTER layer exists or use a comprehensive LISP package that handles layer creation.