Marking a product on sale is one of the most effective techniques to run sales for an online store. It's very simple to set up a "compare at price" with GemPages.
Step 1: Select a variant
From the Shopify admin panel, select a product in Products >> All products. Look for the variants section in the detailed page of the product then click on the Edit button on the right side.
Step 2: Add a compare-at price in Shopify admin
In the new opening page, locate the "Compare at price" box and enter the original price of the product. When you are done, you can hit the Save button on the top right corner of the page to finish.
Step 3: Display the compare at price in GemPages store
In the GemPages editor page, toggle "Compare price" of Price element's settings on.