You can manually modify memory I/O ports, such as swap pins, using the I/O Ports
window or the Package Pins window. Both windows are expandable data tables, which you
can manipulate to more easily view information. For example, you can expand or collapse
the table, filter lists, or sort and move columns. For more information, see this link in the
Vivado
Design Suite User Guide: Using the Vivado IDE (UG893).
Important: DRCs are not performed as you make changes, which means it is
possible to make invalid pin assignments for the memory controller. After you modify
the I/O ports or package pin assignments, it is important to run DRCs as described
in Running DRCs.