You can put multiple PayPal Catalog widgets on the same page or various pages of your site, and if they are all using the same PayPal account (you will enter your PayPal Business account email when you put the widget on the page), all of the products throughout various pages will be added to the same cart.
An example would be: If someone Adds to Cart something from the Clothing page of your site, and then from the cart in PayPal chooses to Continue Shopping, they will be able to browse through the rest of your pages and add more items to the same cart from other Product Catalog widgets.
It is possible to place two products side by side, but it is a little labor intensive at the moment. Here is what you need to do:
- Drag and drop a Columns widget onto your page.
- Drop the PayPal Catalog widget into each of the columns.
- You will need to have two catalog widgets on your page, but you will be able to display your products side by side and the images will resize to fit the available space.