How Does One OVERLAY Multiple Midi Recordings Of An Instrument On The Same Track?

Hello, everyone. I don't imagine this won't be too difficult a query to answer, but alas, I don't know the answer to it, so here I am. :)

When I record a midi instrument - let's say of a midi piano track - and I want to play another take on top of what I just performed on the very same track...how do I get Logic to simply record what I play over the top of what I've already recorded and not erase or replace what I previously performed with the new recording?

Hope that makes sense.

In other words, I'll lay down a midi track, and then when I go back to, say, add some additional notes over the top of what I already recorded, I press record, and when I do that, the record function begins to REPLACE what I previously performed.

Very frustrating.

Any help would be greatly appreciated.

Thanks much in advance!