Horace -
I'm kind of at a loss for words here.  Quite honestly your description makes no sense to me.  Perhaps if you post a picture of what you have - notating what you want it to do it would help.
I feel that either you don't have a firm grasp on terminology or that you don't understand the function of and or how a SubForm works.
I'm not trying to slam you in any way, I just don't understand what is your trying to accomplish.

Hi Scott, well I'm not taking any help as a slam, I just can't figure out how to make a Combo Box (1) Select a Name or Customer from the list in the Combo Box when clicked on it, then display that single Name or Customer in the SUB-FORM and that's it.  I'm working hard to get a firm grasp on RELATIONSHIPS, SUB-FORMS, and COMBO BOXES, but you're right I have a long way to go.  Richards video on "INVOICING" is exactly what I want to accomplish if the COMBO BOX would just place the single record I select after clicking on it,in the SUB-FORM, but it doesn't.  The SUBFORM just sits there on record 1 and doesn't respond.  Richard in the Video creates a SUBFORM but doesn't use it to select records for the SUBFORM, he uses the navigation buttons at the bottom.  I really like the Idea of using a COMBO BOX a Master Form with the SUBFORM embedded in it and controlled by a COMBO BOX.  That idea really saves space and puts a lot of information and control on the screen.  I just can't make it work.

Scott, I made an error in my response.  I meant to say that Richard created a "COMBO BOX in the "INVOICING video and didn't use it to select records.  He selected records using the navigation buttons at the bottom of the SUB-FORM.  Everything I created following the "INVOICING" video works just fine as expected, but I can't make the COMBO BOX place a "single" record in the SUB-FORM.  Thanks for your help

Horace Conti

So... the Combo Box is basically just a tool to select one item from a list of items.  We don't store the item, we store the ID.
Could be apples, pears, oranges, bananas.  Or Customers, or Events, or Orders, whatever.  

If I'm going to the store I'm not going to say I gotta pick up some 1 and 3 - I would say apples and oranges.
I don't want to have to remember what that ID is (that is for the computer to make the relationship) so that is where the combo box comes in.  

So the Combo isn't choosing or selecting any thing.  It's just 'storing' a piece of data, in this case the ID of the fruit.

In the Form > SubForm - the Relationship is created, in the tables underneath, using the ID.

I'd like you to go watch the Event Enrollment video.  In it Richard show some screen shots and diagrams that might help make things make more sense. Same concept only different use.  In that he shows how to use the same data to display things in a different manner.

When you see Richard using the record selectors to move it is from Customer to a different Customer, the SubForm is changing as well because you are telling Access through the Relationship between the SubForm- "I only want to see this customers orders".
In the case of the Invoices video, that Customer may have many orders so the record selector for the SubForm is moving from order to order for THAT Customer.