Hi! The label bar at the top has the class .prodigy-title, so you could do something like this via the global_css config setting to give the container a maximum height and make it scrollable:
.prodigy-title {
max-height: 150px; /* or any other height */
overflow-y: auto;
}
That said, if your goal is to annotate named entities or similar spans and you ended up with this many labels, we'd typically recommend rethinking your label scheme and structuring your task differently. You're making your life a lot harder this way, and it'll be much more difficult to create consistently annotated data with enough coverage, and your model will be much less likely to learn from it effectively. See this thread for more background and suggestions: