Object marker

An object marker consists of a marker arrow, an optical axis and a picture.

• The Near object marker is used to represent a nearby object.
• The Far object marker is used to represent a distant object. It will snap to the nearest edge of an optical space.

Tips for use:

• Change the marker size to change the picture size.
• Adjust the square control to position the ray point on the distant object. The control only appears when a lens, mirror, or eye is placed on the Far object marker).
• Use your own image for the picture by saving this as a bitmap (16 colour/256 colour/24-bit colour) (.bmp), then click the Browse button in the Properties pane to select the picture.

See also:

• Forming an image
• Forming a ray diagram
• Using Optics parts