Once a BDC is added to or created within a top-level block design diagram, BDC
cannot be directly edited from the diagram of the top-level block design. All further
changes to the content of a block design container must happen within the source block
design of that BDC. The user has to open up the
.bd source of BDC, make
changes (such as adding or removing IP blocks), validate the design, and save the source
Note: To change a BDC, double-click the BD source in the Sources window. Alternatively, right-click on the BDC instance in the top-level BD diagram and select Open Source.