BizTalk replace functoid trick

Here's a neat trick I stumbled on in the BizTalk 2006 mapping tool:

If you need to change a functoid that has many links associated with it, instead of deleting the functoid and creating a new one and re-adding all the links, you can just drop the new functoid on the old functoid in the grid. All links and parameters are preserved, just the functoid changes. Here's an example:

Say you want to change the Not Equal functoid to an Equal functoid


Dropping the Equal functoid changes the functoid type, but preserves the links and parameters.

I even tried replacing a functoid with another functoid requiring limited parameters and it still preserves everything even if there are illegal parameters.