You are not being a pain. I am not providing you with enough information so you can find it.
I am presuming you are opening a Paypal payment in the Email reader window.
The blue envelope will not be active meaning it is grayed out until the buyer's name and address is highlighted.
You can use the buyer's user id or their email address to "Find" the invoice. If you highlight the user id OR the email address and right click you are given the option to locate the buyer by email addy or by user id.
Then the correct Invoice will appear in the lower section of the Email reader with the Paypal payment still showing in the upper section.
There is a yellow hand on the center divider about 3/4 way over. IF you click it, you are asked if you want to "Associate" the email with the Invoice.. Associating means the email is tucked into the Email tab on the Invoice so you can view it later from the Invoice. It is a like a file folder that holds all the correspondences for each buyer.
IF you scroll down on the Paypal payment until you find the buyer name and address, then highlight it.
The blue store buyer information becomes active. It is on the top toolbar of the Email reader.
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