I love ChimeraX and use it often for my work, e.g. this one.

When using AlphaFold to predict protein structure, the sequence is pasted into the sequence box.
It does not allow entering the fasta name ">name" before the sequence..
Allowing a name to be included can avoid much confusion.
Presently, the screen shows the output as "best_model" which becomes very confusing when several best models are shown on the screen.
James Raymond
Univ. Nevada Las Vegas