I assume you've printed something from another app with min margins, and also tried generating a PDF from AC and then printing the PDF to the Brother printer from Acrobat or Reader (full scale, centered - in which case anything outside the printable area just gets chopped off).
As an MFC with wireless and wired connectivity, I can see why you chose this. I actually like the bundled Brother software (ControlCenter) - works about the same on any Mac or PC on the network for scanning, fax, printing, etc. I prefer it to HP.
You may need some special paper selection? With my Canon up-to-13x19 borderless color printer, if I want to maximize the print area, I have to select 'borderless xx' as the paper size in the setup dialog. Except for photos, the allowable print area is fine on it though. This is chosen on the Mac from the Page Setup dialog, not from the Print dialog.
Karl
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators