[Grace Themes]

Hi Stephen,

The option is not available to change the order of image slides in the default homepage slider.

If you want to do so you can use another image slider WordPress plugin for homepage slider
https://wordpress.org/plugins/cyclone-slider-2/

To use the this plugin instead of default homepage slider

Go to Appearance » Theme Options » Homepage Slider
Enter your slider shortcode which is provided by plugin without php tag

Regards
Grace Themes