You can use the RowHeight property to specify the height of all rows in Datasheet view.
Note The RowHeight property applies to all fields in Datasheet view and to form controls when the form is in Datasheet view.
Setting
You can set the RowHeight property in Datasheet view by dragging the lower border of the record selector or by clicking Row Height on the Format menu. When you set the RowHeight property by using the Row Height command, the value is expressed in points.
In Visual Basic, the RowHeight property setting is a Long Integer value that represents the datasheet row height in twips. To specify the default height for the current font, you can set the RowHeight property to True (–1).