The print style has effect on the resolution of the barcodes displayed in the result window.

It is a good idea to set a resolution, that is the same as the printer - especially if you are using a label printer with resolution lower than 600 DPI. That will make sure, that the barcodes displayed in the result window is about the same size as the actual, printed barcodes.

The default value (if no print style is specified) is 600 dpi.

Reduce the output size                

If the output is getting too large or if you have performance issues, you can reduce the resolution and check if the result is still acceptable - remember to test all types of output that you want to generate.