robert1997 – 1 hour ago »
She has severe sight loss, however my query is more in relation to the possibility, if any, of changing the device id of the boxes.
I guess the device id is built in to the box (possibly related to the box MAC address). Only suggestion I have is the display order of the available devices is likely to be fixed. If your daughters device id is second in the list as seems likely then a down push on the remote before clicking on the pair TV screen should work.
Zooming in on the tablet using the normal touch screen zoom (drag with two fingers – left diagonally down and right diagonally up may help).