On the Format Tab for Command Button I get:
Caption
Picture Caption Arrangement
Visible
Picture Type
Picture
Width
Height
Top
Left
Back Style
Transparent
Back Color
Border Style
Border Width
Border Color
Font Name
Font Size
Alignment
Font Weight
Font Underline
Font Italic
Fore Color
Hyperlink Address
Hyperlink SubAddress
Hyperlink Target
Gridline Style Top
Gridline Style Bottom
Gridline style Left
Gridline Style Right
Gridline Width Top
Gridline Width Bottom
Gridline Width Left
Gridline Width Right
Top Padding
Bottom Padding
Left Padding
Right Padding
Horizontal Anchor
Vertical Anchor
Display When
Reading Order
And on the Ribbon, under Format, Quick Styles is greyed out (as are most things there).