Instead, create new viewports (see To Create a New Layout Viewport).

Avoid using Windows copy and paste functionality to add viewports to the paper space layout.

Erase extra geometry which may have been placed outside the page area.

Move multiple sheets to new individual paper space layouts.

To improve performance review the following and make changes as necessary: If multiple sheets have been created in the same layout or extra geometry exists outside the page area (in paper space), then performance may degrade. Layouts in AutoCAD are optimized for a single page/sheet (see Organize Drawings). Optimize the paper space layout A delay when initially switching to a layout can be an expected behavior (see: Short delay when switching to a layout tab the first time in a drawing session in AutoCAD ). When subsequent switches to the same layout are slow as well, then it may be necessary to review the contents of the layout.

Ensure that the latest updates for AutoCAD have been installed (see: Where to get Product Updates, Add-ons, and Enhancements).

Confirm that the computer meets or exceeds the minimum System requirements for AutoCAD.

It should also be noted that regardless of how much time has elapsed after the initial release of AutoCAD, updates to the software are not incorporated into the installation package.

System Requirements for AutoCAD and AutoCAD Updates For AutoCAD to run efficiently the application the software should meet or exceed (recommended) the minimum System requirements for AutoCAD.

Software lag switch not working