How to add button in SubForm ?

[cheer]

As title, how can add button in SubForm as shown in attachment?

 

[MStef]

I think your subform is "Datasheet", put the "ContinuousForm" (Defalult View properties).

 

[missinglinq]

As MStef has suggested, if you have a command button in Form Design View and it doesn't appear when running the form, the form is in Datasheet View, and command buttons will not show up. A Continuous View Form will allow the display of multiple records, like a Datasheet View Form, but will also allow for the appearance of command buttons. You can even tweak the design, if need be, so that it still looks like a Datatsheet.