Hi Michael,
Thanks for reaching out and thank you for using Crio Pro WordPress theme with BoldGrid Post and Page Builder!
With Crio and Post and Page Builder you have the ability to use the built in responsive controls to design separate blocks based on device screen size.
The responsive Crio controls are located in your WordPress Customizer. For example you can control the responsive font size of your Header Text in the Crio Customizer by navigating from your WordPress dashboard to Customize > Appearance > Design > Site Title and you can set a Responsive Font Size which will only display on smaller devices.
You can also do something very similar with Post and Page Builder Post and Page Builder. When editing your page and select a block and click the hamburger menu, then Advanced Controls and you’ll see the responsive options there as well.
We have a guide that explains how to do this in detail.
I hope this helps. Please let us know if you have any other questions for us.