Ott tv box help

[Baggers2020]

I have an ott tv box when I was watching a film when my son pressed buttons on the remote and the picture reduced to about a quarter the size of the tv and I can't make it big again I have tried everything. When I go onto menu it's ok but when I go to x to watch films it's small.Help please

 

[UK Dingdong]

Maybe the mode of remote control was touched, you can return to the menu to reset the mode. For some remote can control the size of screen.