# Freezing or locking a case report book

To freeze, unfreeze, lock, or unlock a case report book:

1. Navigate to the Time and Events Schedule for a subject.
2. Click one of the following:
   - Freeze Book
   - Unfreeze Book
   - Lock Book
   - Unlock Book

Note: You can freeze a case report book that includes forms that were frozen previously. When you unfreeze or unlock a case report book, the InForm application unfreezes or unlocks all previously frozen or locked forms.

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