Cullingproblem in the Filmstrip

Please I can not do the following and I can not find any advice in any video: I would like to make a rating 1-5 in filmstrip mode to transfer the suitable images to Lightroom. The large single view helps me with the decision. If I now e.g. assign a number from 1-5 for the first frame on the left in the filmstrip, this frame is moved to the far right to the end. Now I have to laboriously move to the beginning with the scroll bar on the left. It should be possible that I use picture No. 2 can continue to work.