How to make hidden Arrow & Bullet in first and show when mouseover it ?
To make slider with jssor slider maker, open 'layout' window, switch to 'Bullets' tab, and then change 'Show' property. There are 3 options, 'Never', 'Mouse Over' and 'Always'.
To develop your slider, you can change '$ChanceToShow' option. http://www.jssor.com/development/reference-options.html