From help
Open a form in Design view
Change the default settings for a type of control
In the toolbox , click the tool for the type of control that you want to
change. For example, if you want to change the default control style for
text boxes, click the Text Box tool .
Display the property sheet by clicking Properties on the Form Design or
Report Design toolbar.
Microsoft Access changes the title bar of the property sheet to indicate
that you've opened the default property sheet for that type of control.
In the property sheet, change the property settings.
If you want the new settings to apply to all new controls, make the current
form or report a template.
Jeanette Cunningham