Hi,
You need to edit the following CSS:
/* Sub menu indicators
===================*/
.sm-clean a span.sub-arrow {
position:absolute;
right:12px;
top:50%;
margin-top:-3px;
/* we will use one-side border to create a triangle so that we don't use a real background image, of course, you can use a real image if you like too */
width:0;
height:0;
overflow:hidden;
border-width:4px; /* tweak size of the arrow */
border-style:solid dashed dashed dashed;
border-color:#555 transparent transparent transparent;
}
.sm-clean-vertical a span.sub-arrow,
.sm-clean ul a span.sub-arrow {
right:15px;
top:50%;
margin-top:-5px;
border-width:5px;
border-style:dashed dashed dashed solid;
border-color:transparent transparent transparent #555;
}
to something like this:
/* Sub menu indicators
===================*/
.sm-clean a span.sub-arrow {
position:absolute;
right:12px;
top:50%;
margin-top:-5px;
width:10px;
height:10px;
overflow:hidden;
background:url('___YOUR_BG_IMAGE___');
}
.sm-clean-vertical a span.sub-arrow,
.sm-clean ul a span.sub-arrow {
right:15px;
top:50%;
margin-top:-5px;
}
And also you may want to check/tweak the following options:
subIndicators: true,
subIndicatorsPos: 'prepend',
subIndicatorsText: '+',
Cheers!