Blog post page appearance

Hi Tanet,

I have a few questions about the blog post settings. Where can I find the settings for the blog post pages? For example:
– I want to edit/delete the sharing side bar on the left.
– I want to change the color of the ‘post comment’ button
– I don’t want to show the previous or next blog post at the bottom of the page
– what is the ideal size for the featured image of a blog post? Mine appear too big now.

Thanks for your help as always.

Best regards, Iris