Add button in and edit the styles of button including adding and positioning icons. Please check following video for working example.
Button Contents accordion inGeneral tab has following options are available
Edit button text
Button text size, color, & other text style options
Add button icon & style icon
Add color or gradient on background in button in normal and hover stage. Please check video above for working example. For more details about background please check How to Edit Background Styles and for hover styles please check Hover Styles
Add custom link / URL in button from Button Link accordion
To make 2 or multiple buttons inline with each other. Please check following video.
To align multiple inline buttons to the center. Go to column edit modal and set horizontal align to center.
Common Styles used in styles tab. Control the settings in styles tab from common styles.