Carousel and featured images

Hi there,

Given that there is no documentation or video I hope you don’t mind answering a few questions:

1). Can you explain step by step how the carousel works and what size images need uploading.

2). When adding a new post can you explain how the images work? For example I need to add a 500×500 image so that it displays correctly on the metro style homepage. But then so that it displays correctly in the category pages you say it needs to be 250 x 250 and then if I want an image to display at the top of the post on the single post page then I would need another image at different dimensions? Can you clarify this please