Change arrow icon

Hello,

I really like this pluggin. I just want to change the arrow and put a bigger Icon ! When I do it, my icon is cut, i jusy see the half ! The dimension of my new icon is 28x28px.

I use this code :

.collapseomatic {
background-image: url(http://…./basic-icon-plus.png) !important;
}
.colomat-close {
background-image: url(http://…./basic-icon-plus.png) !important;
}

What should I change ? Someone can help me ?

Seb 🙂

https://wordpress.org/plugins/jquery-collapse-o-matic/