Remove extra space

Hi there,

add this CSS:

.archive.category h1 {
    margin-bottom: 0;
}

Please send me the screenshot where I add this CSS

Go to Appearance > Customizer > Additional CSS and you can paste that CSS in before any other css.

Thanks, for all post pages I don't need large image. please see the screenshot:
https://www.screencast.com/t/a66IuVHEE

Do you want to keep this style but with a smaller image or do you want this section removed completely?

Actually, I need image in above mark with border with green color. I don't need large image layout section which I have mark with red color

Do you mean the width of the green box?

Then go to appearance > elements > single post hero, change the quick hook select tobefore content:
https://www.screencast.com/t/Vs2yVLdmwu

ok

Navigation or menu bar is not showing on post. When I click on post on any post. I sent you private information including url and screenshot

Go to appearance > elements > secondary navigation, click the xbutton to remove the post > all posts from the exclude list.
https://www.screencast.com/t/F3aw9TNDRZ

Thank you so much

You are welcome :)