Use the following procedure to work with a layout, create and apply layout scenarios:
Manipulate the components in the layout. A new scenario will appear in the Layout Scenarios Window, named Scenario 1. The changes made are listed in the Changes column.
Select Initial Scenario in the Layout Scenarios Window, and create another scenario in the same way. This scenario will be named Scenario 2.
You now have an initial scenario, which has the initial component placements and signal assignments, and 2 scenarios, each with different modifications.
To switch between scenarios in the Layout Window, right-click on a scenario and select Activate.
This will not apply the scenario, it just allows you to view and manipulate it. You can continue to make changes to each scenario.
Upon creation of a suitable scenario, right-click on the scenario in the Layout Scenarios Window and select Apply Scenario.
The changes recorded in the scenario are applied to the layout, and the FPGA database for the device is updated with the new pin assignments.