depends on the panel location, captive panels{not my 1st choice} tend to be top/bottom entry's only.
IMO, nm panels look better if they are all top fed , however this is hard to do with the growth of circuit dedication ,or those like myself that overwire.....
for this reason, i will mount cellar wall panels on 2x4's, so i can fish behind the panel for a bottom entry when the top is full.
one can also use connectors listed for more than one nm cable.
i like to mark the nm on just outside the panel, as well as on the directory. This simply saves taking off the cover for future work/tracing....