Hi Phill,
The original concept was to have an image as background and then overlay the text. This gives more control of text appearance on devices.
You have the text as part of the image so it will resize as the image size changes.
To make the images display on mobile phones you need to add some custom css to your rt_myriad-custom.css
#rt-slideshow .sprocket-fullslideshow-image {
background-size: contain;
}
It is not ideal, but as I said previously, you are not using roksprocket in the manner it was expected for the template.
If this resolves your problem then please edit your first post in this thread by adding [SOLVED] at the start of the title and click on the icon and select the 'tick' icon. This lets the moderators know that it can be moved to the solved section.
Thanks for your cooperation
The following users have thanked you: Phillip Read