Learn how to create a split button dropdown with CSS.
Read on how do to it in this link: https://www.w3schools.com/howto/howto_css_button_split.asp
Split Button Dropdowns
Hover over the arrow icon to open the dropdown menu:
Try it yourself here: https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_button_split