When Data Reader on large dataset, hotkey left/right arrow to move curor to previous/next one

Hold Shift + hotkey right arrow will increment by 5 (Already support in old version), system variable @DRS to control

Hold Ctrl + hotkey right arrow will increment by 15, system variable @DRC to control

Hold Ctrl + Shift + hotkey right arrow will increment by 50, system variable @DRSC to control