Layers

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Note: In GeoGebra, layers are used to determine which object to select or drag when the user clicks on multiple objects at the same time.

By default, all objects are drawn on layer 0, which is basically the background layer of the Graphics View. A total of 10 layers are available (numbers 0 to 9) and higher numbered layers are drawn on top of lower numbered layers.

Using the Advanced tab of the Properties Dialog, you can change the layer for a certain object (layers from 0 to 9 available). Once you change the layer number for at least one object to be different from layer 0 (e. g., to layer 3), all new objects will be drawn on the layer with the highest number that is used for any object.

Note: After selecting any object, you can select all objects in the same layer by selecting item Select Current Layer (keyboard shortcut: Ctrl + L) from the Edit menu. This menu item is only available if all selected objects lie on the same layer.

Further use of layers

  • For SVG export, objects are grouped by layer.
  • Layers can be controlled using the JavaScript Interface for GeoGebra applets.
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