Layer Setup
The Layer Setup 
tool opens the Layers
dialog, where you create, edit, and organise the layers in your drawing. Layers let
you group related entities — for example outlines, bend lines, and dimensions — and
give each group its own color and line style.
The Layers dialog
The dialog lists every layer in the drawing in a table with three columns:
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Name — the layer name.
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Color — the color used to draw entities on the layer.
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Line style — the line type used for the layer.
Every drawing has a layer named 0; it cannot be renamed or purged.
Adding and editing layers
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Click Add to create a new layer. In the New layer dialog, type a Name, click the Color swatch to choose a color, then click Add.
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Double-click a layer row to open the Edit layer dialog, where you can change the layer’s name and color. Click Update to apply. Layer 0 cannot be renamed.
-
Click Purge Unused to remove every layer that contains no entities. Layer 0 is always kept.
Layer names must be unique and may contain only letters, digits, underscores
(_), and hyphens (-) — no spaces.
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Moving and selecting entities by layer
Click More Actions… to open a menu of commands that act on the selected layer:
-
Select all entities in this layer — selects every entity on the layer.
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Move selected entities to this layer — moves the currently selected entities onto the layer.
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Move this layer entities to layer "0" — moves everything on the layer onto layer 0.
Press Esc to close the dialog.