Data Entry Efficiency Help

Hello, I'm looking for suggestions on improving navigation in large spreadsheets.

I've got a table that looks something like this, except it has a couple hundred columns and rows
NappingExample.png

I'm entering in the 'descriptor' data, which is freely generated for each Judge (a 1 represents that the judge used the descriptor for that product). For example, Judge1 for Product 1 can say 'sweet', for Product 2 can say 'pineapple' and 'cherry'. As I enter the descriptor data for each judge, I am adding descriptor columns for new descriptors and placing 1's.

My problem is that I have many judges, many products, and many descriptors, so as I enter data I spend more time scrolling to place a 1 under the descriptors they used than anything else. I have the top descriptor row frozen so that I can still see the descriptors and they are sorted alphabetically, but that only helps so much. Can anyone think of a way to make navigation easier for entering the data? I would love a way to be able to skip over to a particular descriptor or descriptor starting with a particular letter.

Any suggestions would be appreciated,
Thank you!!