Two problems about Content Slider, help please.

Hi JUX team , I have purchased your Content Slider to make it appear on our Home page,
and we've selected K2 Content for the source. So we have encountered two problems here.

1. We would like to make our K2 Articles having " control bar " ( i.e. users could know they have to slide contents)
And we've selected the control style as "Arrow", red (#ff000),
but some how it doesn't appear like in the demo.

2. We attempted to put five columns along with pictures in Content Slider,
but somehow its space seem too limited for Chinese contents. So we would like to make the columns bigger, is there any way to do so?
We think the gap between images in your demo is really great,but we've tested with your demo pictures, the result turned out to be too width as well..
If there's any way we could make columns' width higher ?