If the scan doesn't include the entirety of the information, do I enter what I can see or do I leave in blank when indexing?
You would fill in the information you see into the correct fields.
If the information is unreadable for any field you mark it as such with CTRL U or if it is missing you would mark it as blank with CTRL B.
If all of the information is unreadable you would indicate the question for Should this image be indexed? as No, No Extractable Data.
Otherwise you could return the batch
It is always best to include a Share Batch code. For this question we would be able to tell if it was the batch itself with the issue or with your computer not loading the batch correctly. It is impossible for us to know without looking at the batch. We can only guess.
The Share Batch link or code is not related to the film or image number. Instead, it is a unique number assigned to the batch for the sole purpose of sharing the batch.