Drag screen from the corner

[Crist1693]

Que significado tiene la pantalla cuando arrastro de una esquina como que se encoge y no se para que sirve

What is the meaning of the screen when I drag from a corner like it shrinks and does not stop?

-GT

[Amar17]

If you are using Xperia XA Ultra then it means "One Handed Use". You can disable it somewhere in settings..