Won't change from landscape to portrait

DeborahL

Commendable
Jul 7, 2016
2
0
1,510
When I'm reading an iBook on my RCA tablet. It will only display in landscape mode. It won't change to portrait. This only happens when reading books. It only does this with this app and no others. This started just two days ago.
 

DeborahL

Commendable
Jul 7, 2016
2
0
1,510