I don't use this for the labels that I have to print. I use a program called "Bar Tender." It lets me create the labels that I need, save them, add bar codes as needed, use labels in a bunch of sizes, and save each one to be able to modify and print on the fly. For customers that require that I print bar coded labels for the inner and outer packaging, it has saved my bacon. I also have used Word Perfect, selected the label type, made and saved labels, and added bar codes (they're just a font, make sure you use the right kind). Both let you select where on the label stock sheets that you want to start the print. I don't know how either would work on a dedicated label printer machine, but both work swell on your basic laser printers.
Hope this helps,
Ann

We print labels from Evo for Sales Orders, Work Orders and Inventory Items.  It took some fussing to get the shape/size/alignment correct but it works for us.  Are you using a roll feed printer or sheets?  I found that the key is to make sure the paper size is correct and that nothing extends beyond the boundaries of the "Paper" on the screen.

What program calls that RTM?

That wasn't on my menu.  After adding the program, it appears to print ok for me. I did edit the "form" to set the paper size to 4" x 6" and dropped the margin size, which effectively decreases the printable area.  I can send a copy of my modified .RTM.  There may still be some fussing with your printer setup to shift the print area to align properly with your label.

If I knew how to post a picture, I would include a screen shot of my print preview.  As for margins, I have the left set to zero and the top as small as I can make it.  I think it's .05".  You can play with the paper size (adding a quarter/half inch and adjusting margins to center the content.

Can't wait to try this my bin and shelf labels need updating bad.