## RenderRegionToggleSelectionTracking

### Introduced

v6.0

### Description

Toggles the render region's selection tracking state in the specified viewport(s). When selection tracking is on, the render region will only render the portion of the render region that contains the selected object(s) total bounding box. When off, it renders any object that is render visible within the render region.
Note: When toggling the selection tracking state for all regions at the same time, if at least one region had selection tracking turned on, then the selection tracking state of all regions will be turned off by this command. Otherwise it will be turned on. Also note that changing the selection tracking state of all regions will also change the global default and preferences.
This command replaces the obsolete command ToggleSelectionTracking.

### Scripting Syntax

    RenderRegionToggleSelectionTracking( [Viewport] );

### Parameters

Parameter | Type | Description
--- | --- | ---
Viewport | siViewport | The viewport(s) containing the render region with the selection tracking to toggle. Default Value: siViewportCurrent (the viewport the cursor is currently hovering over)

### Examples

#### JScript Example

    // Toggles the selection tracking status of render regions in all viewports.

    RenderRegionToggleSelectionTracking( siViewportAll );

### See Also

RenderRegionCreate RenderRegionClose RenderRegionToggleVisibility RenderRegionRefresh RenderRegionSave RenderRegionSetDisplayType RenderRegionSetRefreshMode RenderRegionSetRenderChannel