% enable transio access for all arrays larger than 500k
xff(0, 'transiosize', 5e5);

% disable transio access
xff(0, 'transiosize', Inf);

% enabled transio access for VTCData elements only
xff(0, 'transiosize', 'vtc', 5e5);

% get current xff/transio configuration settings
xff_tio_config = xff(0, 'transiosize');

% restore configuration
xff(0, 'transiosize', xff_tio_config);