How to go about modifying the Wordpress “Pages Add New Screen”

Question

I have been thinking about developing my own theme framework for worpdress. I\'d like to use jquery ui to build a bootstrap 3.0 drag and drop interface, which I already have

Answer 1

We add a Custom Meta Box and do our thing inside it.

There are some hooks that are not Meta Boxes and we can use to insert content into that admin page:

add_action( 'edit_form_top', function( $post ) 
{
    echo '
edit_form_top
';
});

add_action( 'edit_form_after_title', function( $post ) 
{
    echo '
edit_form_after_title
';
});

add_action( 'edit_form_after_editor', function( $post ) 
{
    echo '
edit_form_after_editor
';
});

add_action( 'edit_page_form', function( $post ) 
{
    // edit_page_form is ONLY for pages, the other is for the rest of post types
    echo '
edit_page_form/edit_form_advanced
';
});

add_action( 'dbx_post_sidebar', function( $post ) 
{
    echo '
dbx_post_sidebar
';
});

The widget_text block belongs to Advanced Custom Fields (it's a repeatable/sortable field). I'm not sure anymore, but I think it removes the Meta Box borders with CSS or jQuery.