Slider

Hi, Coller looks great.

Does Coller allow custom images in the slider? and what size is the slider?
I want to have a full width image/custom slider appear at the top of all pages and posts pages/blogs, right under the header.
so I want…..
navigation and header/header and navigation… doesn’t matter which way these are…..
then
a full width slider ideally about 250-300 deep(not of featured images) but of my own images
then
the page content or the blog/posts content under that in a 2 column format (1 column and sidebar)

Meaning that the slider is almost the same width as the header, and it appears no matter where you are on my site.
Will Coller support this? or can you recommend another of your themes.

I am an intermediate wordpress user, so an advanced/developer theme would not suit me.
I hope this makes sense for you!
Best regards