ı can't see hadle on composition screen

Sometimes ı can see handle easily but sometimes this can be a seriously big problem for me. In this work, ı can't find handles if ı move later or back keyframe and zoom ı  find it but there must be an easy way ı make big handle  or bezier interpolation but , these are not permanent solutions. (my english isn't perfect ı hope I was able to explain my problem correctly )