After installing your new theme in Prestashop 1.5, you will now have the ability to use it for your stores. Follow the instructions below in order to assign your theme for a store in PrestaShop 1.5.
Setting your shop’s theme in PrestaShop 1.5
- Log into your PrestaShop 1.5 dashboard.
- Using the top menu bar, hover over the Preferences tab and click on the Themes option from the menu.
- You are now on the theme selection page. Under the theme list there is a section named Theme Appearance. This is where you will choose your theme. Simply select the theme you want to set for your store by clicking the respective radio button.NOTE: If you are in multistore mode, be sure you have selected the correct store or group from the dropdown at the top of the page.
- Once finished, select the green Save button from the upper right corner of the Theme Appearance section. The screenshots below show a sample of a theme change.
Before After 
