Aligning objects from slide to slide in Fluid Boxes

Careeful with master slides having Fluid boxes. You cannot use the Main master slide, because it will mess up all slides.  Just wanted to specify. Master slides having fluid boxes can also allow the arrow to move around if you don't set up the fluid box properly. Timing for the rest of the project is theoretically not possible, but works sometimes when you use the same master slide (not the main master slide) for all slides.

I would prefer to use the Position Properties to anchor that arrow to two sides of the slide. You don't show the Fluid boxes setup of that slide. If you have Three horizontal fluid boxes, where the arrow is in the third one, use 'Squeeze in a row' and it will always remain to thr right slide. It depends on the other fluid boxes whether it will reamin in the center verrtically...