Vertical /Horizontal Line appear on zooming out pic

Hi,

I got this MacBook Pro (late 2016 model) in January 2017. after a few months of using mainly for light browsing, this vertical/ horizontal appears when zooming out any picture . it just happen few days ago. however the line never shows when use as normal

(without zooming out ) . believe my MacBook Pro still under a year warranty (6 months left) is there anyway to fix ?

thank you