If your product descriptions are long, you may wish to move your Add to Cart button above the description so it's more immediately visible to customers.  

In order to do this, follow these steps:

1. Click the Themes link on the left side of your Shopify dashboard and look for the ShowTime theme.

2. Click the the ... button and choose Edit HTML/CSS from the drop-down menu as shown below.

3. Scroll down and locate the Templates folder.  Look for the file called product.liquid and click it to open it in the editor.

4. Look for this code (around line 48):

<div class='rte' itemprop='description'>
{{ product.description }}

5. Move this code down below to immediately after this code (around line 92):

<input type='submit' name='add' class='btn_c' id='addToCart' value= {{ 'products.product.add_to_cart' | t }}'>

6. Save the file

The add to cart button should now be positioned above the description.