Please send a screen shot

If you reference a video, please give the timestamp from that video.

You mean deleting a record?

Yes, Richard. I want remove the Record before Saving to the Table or when Edit the Record using the Form.

If you are still on the record, and have not moved to another record, that record is dirty, which means if you hit escape, all entries will be removed on that record.

If you have moved away from that record, and it has been saved, then return to the record selector of that line, and click delete on your keyboard.

Watch this video:

Dirty

Ok, Sami, but we disabled the Record Selector on the Subform so own Employee cannot use it. So, I wanted  the use a Button to Remove or Delete a Row from the Subform if Changes need to make to an Estimate or Contract. After it has been saved to the Table.

Use SQL in your button.

Example:
CurrentDB.Execute "DELETE FROM CustomerT WHERE CustomerID=" & CustomerID
Me.Requery

Oh ok Kevin, that what I came up with first but I was not sure.

If Dirty = False Then
CurrentDB.Execute "DELETE FROM EstimateDetailInfoT WHERE ProductID=" & ProductID
ElseIf Dirty= True Then
Me.Undo
End If

I'd be careful with having the undo button be the same as your delete button, you should probably make them separate. Someone might think they are just undoing what they've done and accidentally delete the entire record, especially without warnings or a confirmation box.

Hey, Adam... You was right. I am not trying to DELETE all the Data from the Estimate Detail Table that is where the ProductID = the ProductID on the Form. I am trying just Delete the one or two Line in the Sub Continuous Form that a User didn't not needed for the Estimate. Is there a way do it SAFETY?

Are you saying your deleting more records than just 1? You must have the wrong delete criteria. I'm not sure on your table setup, but for instance the Invoice/InvoiceDetail tables that Richard uses in a lot of his classes. The InvoiceT would be the main information and the InvoiceDetailT are the individual lines in the subform. In that case, you would delete from InvoiceDetailT where InvoiceDetailID=InvoiceDetailID, not where InvoiceID=InvoiceID, or you would delete all the entries for that invoice.

Also, at the very least, I would add a messagebox to let the user know whats going on.

If Msgbox("You are about to delete the record, do you want to continue?",vbyesno)<>vbyes Then Exit Sub
'Rest of your code

Here's the Form Setup...