Mirror

The mirror command creates mirrored copies of selected entities reflected across a two-point axis. The originals are always kept — unlike Move or Rotate, Mirror never modifies existing entities; it only adds new ones.

Two ways to start

Pre-select, then mirror — select entities first, then activate:

1. Select one or more entities on the canvas.
2. Type mirror in the terminal or click the Mirror toolbar button.
3. Click the first point of the mirror axis, or type X,Y and press Enter for an exact coordinate.
4. Click the second point — mirrored copies are placed and the command exits. Coordinate entry works here too.

Activate, then select — start the command with nothing selected:

1. Type mirror or click the toolbar button.
2. Select objects — click to toggle, or drag to select by area.
3. Press Enter or Space to confirm the selection.
4. Click the first point, then click the second point of the mirror axis (coordinate entry available at both steps).

  Original:          Mirror axis:        Result:
                     |
  [entity A]    →    |    →    [entity A] + [mirrored A]
                     |

A live preview of the mirrored copies follows the cursor while you position the second axis point.

Mirror axis

The axis is an infinite line through the two clicked points. It can be at any angle:

• Move the cursor close to a 45° snap axis (0°, 45°, 90°, 135°, …) and the axis locks to that angle — useful for clean horizontal, vertical, or diagonal reflections.
• Click away from the snap zone for a free-angle axis.

Coordinate entry

At either axis-point step, type an exact position instead of clicking:

1. Type the X value.
2. Press , — the terminal shows [X], [Y{cursor}].
3. Type the Y value.
4. Press Enter to confirm.

Keyboard reference

Key	Action
Enter / Space	Confirm selection
0–9, ., -	Start X coordinate entry
,	Lock X and move to Y entry
Backspace	Delete last typed character
Enter	Confirm typed coordinate
Escape	Cancel and reset

Selection during the command

Method	Behaviour
Click	Toggles the entity under the cursor
Drag right (strict)	Adds entities fully inside the box
Drag left (crossing)	Adds entities that intersect the box
Enter / Space	Confirms the selection

What gets mirrored

Every entity type is supported. Geometry is reflected across the axis mathematically:

Entity	What changes
Line	Both endpoints reflected
Circle	Center reflected; radius unchanged
Arc	Center reflected; start and end angles recalculated across the axis
Ellipse	Center reflected; major axis direction flipped across the axis
Polyline / Rectangle	Every vertex reflected
Text	Anchor point reflected; text string is not reversed
Spline	All control vertices / fit points reflected

Mirror vs Copy

	Mirror	Copy
Originals	Always kept	Always kept
New entity position	Reflected across an axis	Offset by a displacement vector
Best for	Symmetric designs, bilateral features	Repeating geometry in any direction