You can control the visibility of objects in a floating viewport using several methods. These methods are useful for limiting screen regeneration and for emphasizing or hiding different elements of your drawing.
You can control layer visibility separately in each floating viewport. You can also specify default visibility settings for new viewports and for new layers.
You can freeze or thaw layers in current and future floating viewports without affecting other viewports. Frozen layers are invisible. They are not regenerated or plotted. Freezing layers is useful, for example, for displaying annotation only in a particular viewport. In the illustration, the layer showing terrain has been frozen in one viewport.
Thawing the layer restores visibility. The easiest way to freeze or thaw layers in the current viewport is to use the Layer Control list box on the Object Properties toolbar. You can also use the Layer Control when you need a quick update on which layers are frozen in the current viewport.
When you do not want objects in paper space to be displayed or plotted, you can freeze the layers that contain them. For example, if you do not want to display floating viewport borders, you can freeze the layer on which the viewports were created.
You can set visibility defaults for specific layers in all new floating viewports. For example, you can restrict display of dimensions by freezing the DIMENSIONS layer in all new viewports. If you create a viewport that requires dimensions, you can override the default setting by changing the setting in the current viewport. Changing the default for new viewports does not affect existing viewports.
You can create new layers that are frozen in all existing and new floating viewports when Tile mode is off. Then you can thaw the layers in the viewports you specify. This is a shortcut for creating a new layer that is visible only in a single viewport.