LAYOUTREGENCTL
Controls how drawings are regenerated when switching between the Model tab and Layout tabs. In some cases, you can improve system performance by setting to 0 or 1.
Type: Integer
Saved: In the registry
Range: 0 (Regenerates each tab), 1 (Regenerates each tab, but saves to memory the Model tab and the last used Layout tab), 2 (Regenerates each tab the first time only, then saved to memory)
Default: 2