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Map auto extent options.
| Constant | Value | Description | 
|---|---|---|
| esriExtentDefault | 0 | Extent is same as map's. | 
| esriAutoExtentNone | 0 | |
| esriExtentScale | 1 | Extent is calculated to preserve specified scale. | 
| esriAutoExtentScale | 1 | |
| esriExtentBounds | 2 | Extent is specified manually. | 
| esriAutoExtentBounds | 2 | |
| esriAutoExtentMarginPercent | 3 | Extent is calculated by applying a margin (specified as a percentage) to the extent of another data frame. | 
| esriAutoExtentMarginMapUnits | 4 | Extent is calculated by applying a margin (specified in map units) to the extent of another data frame. | 
| esriAutoExtentMarginPageUnits | 5 | Extent is calculated by applying a margin (specified in page units) to the extent of another data frame. | 
| esriExtentPageIndex | 6 | Extent is driven by the page index. |