when grid is not displayed', or (2) turn OFF 'Display Gridlines on Screen' and turn ON 'Snap objects to grid.' Then hold down as you draw the arrow.
But if you were trying to get it close, but not on that point, then it’s a hassle. Note: The check box, Equal X and Y Spacing, applies to both snap and grid spacing. But a more elegant solution would be if you could temporarily disable InDesign’s “Snap To” feature while positioning your layout element, then reenable snapping when correct placement is complete. In the lower-left corner of the artboard, click Turn on snapping to snaplines.To turn off snapping to snaplines, click the button again to see the off icon. Snap to Grid Settings in PowerPoint 2013 for Windows.