mobile header

Hello! please tell me how to make another header image in mobile version of the site.
when you open the site from mobile devices, a different image was displayed.(site header)
https://prnt.sc/jhmae1 – regular version
https://prnt.sc/jhmbhs – mobile version
https://prnt.sc/jhmdv4 – make so
The image should not be stretched, and to substitute another
Thanks!

• This topic was modified 6 years, 10 months ago by sergeygrey.