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filter is not described

screen_options_show_submit filter-hook . WP 4.4.0

Filters whether to show the Screen Options submit button.

Usage

add_filter( 'screen_options_show_submit', 'filter_function_name_538', 10, 2 );
function filter_function_name_538( $show_button, $this ){
	// filter...

	return $show_button;
}
$show_button(true/false)
Whether to show Screen Options submit button.
Default: false
$this(WP_Screen)
Current WP_Screen instance.

Where the hook is called

WP_Screen::render_screen_options()
wp-admin/includes/class-wp-screen.php 1013
$show_button = apply_filters( 'screen_options_show_submit', false, $this );

Where the hook is used (in WP core)

wp-admin/includes/class-wp-screen.php 1189
add_filter( 'screen_options_show_submit', '__return_true' );
wp-admin/includes/class-wp-screen.php 1239
add_filter( 'screen_options_show_submit', '__return_true' );