I'm not quite sure what you are asking either but I'll give it a go ...
to get a borderless print you normally will need to select borderless(auto expand). This should result in a borderless print side to side, but will require both ends to be trimmed to the specified length to be "borderless". Trimming the print should require cutting into the printed area slightly.
If you want a borderless print produced without having to do any trimming on the ends, you will have to enable double cutting, then the printer will cut a strip of paper between each print, resulting in a full bleed print.