Set slider defaults in v2 of Soliloquy.

functions.php

<?php
/**
 * Add Soliloquy defaults.
 */
add_filter( 'soliloquy_defaults', 'tgm_soliloquy_default_settings', 20, 2 );
function tgm_soliloquy_default_settings( $defaults, $post_id ) {
    
    $defaults['slider_width']  = 800;   // Slider width.
    $defaults['slider_height'] = 400;   // Slider height.
    $defaults['control']       = 0;     // Turns navigation pagination off by default.
    $defaults['duration']      = 10000; // Set duration of slide to longer time.
    $defaults['slider_size']	 = 'full_width'; // Dimensions.
    
    return $defaults;
    
}