Within Theme Styles, you can choose one of the following styles of Envy:
Stockholm
Copenhagen
Oslo
Gothenburg
Changing your theme's style will affect both the settings and look and feel of your store.
Some settings will be lost when you change your style, but you will not lose any content from your store.
Within your Shopify admin, go to Sales Channels > Online Store > Themes.
Click your theme, and select Customize.
On the left-hand menu, select Theme settings.
Scroll down to select Theme Styles.