mail merge for a single record

Hi I have an access .adp project which is linked to a sql server tables (2008 r2), I have a button on an access form which I click and successfully gets customer details based on a query. What I wanted to know is when I am viewing a specific record i.e. details for Patient Number X, when I click on a mail merge button from their record form can the mail merge document only open with their details not all customers?



I have tried to delve into vba and modules to acheive this but I am a newbie



thanks

mail merge for a single record