Sometimes your shipping platform or the settings on your application results in prints that are off center or cut-off. It could also be as simple as the purple sliders being too wide so a quick fix is to adjust it according to the size of your labels.
Rollo X1040 Wireless Printer
Rollo X1038 USB Printer
You can adjust these margins and define new paper sizes by right clicking on "Rollo Printer" and choosing "Printer Preferences"
Click on "Settings" and adjust the margins as desired. You may need to do some trial and error to find the perfect combination. You may enter both negative and positive values here.
Click on "Apply" or "OK" to send these settings to the printer for your next printing.
If you're using Safari, you may need to increase the scale as it adds mandatory margins to your labels. You may also try using another browser like Google Chrome.
You may also access and check the Mac print dialogue settings to make the necessary adjustments. Once you have the printer dialogue open, simply select "Printer Features" and "Page Options". From there, you will be able to adjust the Horizontal and Vertical offsets.