About Controlling Drawing Details with Layers
You can organize and control your drawing detailing by assigning drawing items to layers. You can hide and show layers as necessary, which allows you control the display of multiple drawing items simultaneously. For example, you can assign notes to a specific layer and then hide them before plotting the drawing.
Using layers, you can organize items and streamline selection because all the layer items are treated as a group. Layers can include other items in a Creo Parametric database such as features, dimensions, notes, geometric tolerances, and other layers.
You can place drawing items on layers in the following ways:
• Manually—Place the items on a layer after they are added to the drawing. You can individually select the items to add or you can use region selection.
• Default Layers—Define specific items to automatically place on a layer as they are created. Detail items, such as driven dimensions, draft entities, and snap lines can be added using this method. You can either specify detail items using the individual default layer settings or you can add all detail items to a default layer. The same default layers that exist in 3D mode, for example, layers for curves, mechanical features, or rounds, exist in Drawing mode.
Although drawing views do not have individual layers for each view, you can control the display status of drawing layers for individual views by overriding the model layer status. Controlling the layer display for individual views enables you to:
• Include items from parts and assemblies directly in a drawing layer without including them on a layer in a model.
• Control the display of drawing layers to include items from the model without marking the model as changed.
• Vary the display of a single model in different drawing views.
Layers and their contents can be accessed from the Model Tree. To show the Layer Tree, click Show > Layer Tree on the Model Tree window. The display status (hidden, unhidden, or isolated) of a layer controls whether or not items in the layer are displayed.
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• When blanking or displaying layers containing datum curves, the hidden lines of three dimensional objects are recalculated to ensure that the drawing is updated and accurate. You can reduce the regeneration time by excluding datum curves from these hidden line calculations using the hlr_for_datum_curves Detail option.
• If you set the Detail option ignore_model_layer_status to yes, you can display or hide solid model entities, features, and components in Drawing mode by using the Show In Model or Hide In Model commands. These commands are available when you right-click a solid model entity, feature, or component on the Layers tree or on the Model Tree. The selected items are temporarily displayed or hidden in the graphics window and added to the Shown Items or Hidden Items layer.
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