buttons on layer slider not available

i’m working off of a demo in enfold for a photography portfolio. the demo has a layer slider on the homepage with buttons but when I go in to edit this, there is no option available for buttons. the site is almost done and I would like some help here. any suggestions?
thanks,
jenny

p.s. i used this theme years ago and am familiar with the buttons….so I know for sure that they just aren’t there.