WordPress at a glance
filter is not described

default_page_template_title filter-hook . WP 4.1.0

Filters the title of the default page template displayed in the drop-down.

Usage

add_filter( 'default_page_template_title', 'filter_function_name_5629', 10, 2 );
function filter_function_name_5629( $label, $context ){
	// filter...

	return $label;
}
$label(string)
The display value for the default page template title.
$context(string)
Where the option label is displayed. Possible values include 'meta-box' or 'quick-edit'.

Where the hook is called

page_attributes_meta_box()
WP_Posts_List_Table::inline_edit()
wp-admin/includes/meta-boxes.php 893
$default_title = apply_filters( 'default_page_template_title',  __( 'Default Template' ), 'meta-box' );
wp-admin/edit-form-blocks.php 161
'' => apply_filters( 'default_page_template_title', __( 'Default template' ), 'rest-api' ),
wp-admin/includes/class-wp-posts-list-table.php 1585
$default_title = apply_filters( 'default_page_template_title',  __( 'Default Template' ), 'quick-edit' );

Where the hook is used (in WP core)

Does not used.