Reduce over all size (or at least the slider height)

I really like this theme, however it seems a little (too in your face) on the home page. If I change the zoom on my browser to 80% i really like the entire size, as the feature items below the home page are visible.

1. Is there an easy way to reduce the theme layout/size?
if not...

2. Can I reduce the following:

• site header (where the logo is)
• slider height

 

It is not possible to decrease theme layout.
You can decrease page height by decreasing margin.

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

.flexslider .slides img {
max-height: 270px;
}
.slider-wrapper-container h2 {
margin-bottom: 10px;
}
.slider-wrapper-container {
padding-top: 10px;
}
.main-content-container {
margin-top: 15px;
}

 

Is there a way to reduce the width?

 

No, It is not possible to reduce layout width.