Themonic-Support

You just have to enter the following in between your paragraphs in the post editor to break the singlepost into multiple

<!--nextpage-->

like this:

Pagination is inbuilt in the theme.

Third option from top, turn it ON

We will try to add “Email to Author” support in one of the upcoming versions.

1)

.entry-content p {
    margin: 0 0 20px;
}

2,3) Only background and text color can be changed of mobile menu. Arrow color is linked to text color.

For text color of mobile menu

.js .selectnav {
    color: #000000;
}

4)

.categories {
    display: none;
}

5)

.comments-title {
    font-size: 20px;
}

6)

.entry-content ul {
    font-size: 20px;
}

7)

.entry-content blockquote {
    background: #F49C9C;
}

8) You can target h1 heading as below, check out CSS guide for text bg color

.entry-content h1 {
    font-size: 21px;
}

9)

.below-title-meta a {
    color: #F49C9C;
}

It’s not a theme feature, it’s built in WordPress, I don’t think you can rename it easily without writing a function but you can style it.

Refer: https://codex.wordpress.org/Styling_Page-Links