If you want site visitors to be able to resize the frame, on the AutoFrames tab of the MasterBorders Properties panel, select Generate HTML frame borders.
To set frames to be borderless in the site visitor’s browser, clear Generate HTML frame borders. NetObjects Fusion 12 turns off the borders for all frames in that MasterBorder.
To combine frames with borders and frames without borders on the same page, you must script the frames. See Examples of Page and AutoFrame HTML.