lv_obj_scroll_by() function
Scroll by a given amount of pixels
Arguments
obj
pointer to an object to scroll
anim_en
LV_ANIM_ON: scroll with animation; LV_ANIM_OFF: scroll immediately
Notes
> 0 value means scroll right/bottom (show the more content on the right/bottom) e.g. dy = -20 means scroll down 20 px