Unfortunately, the application does not allow you to create multiple labels on one page. The most simple way is to design the label you want is to use Gimp and manually multiply the image to fit on the entire page and then print it. Gimp is something similar to Photoshop.
Download and install the application and create a new A4 page. Open the label image and then add it to the main page. With CTRL, select the image then use Copy and Paste. At the end of the process, use File > Print and print your labels.