The correction window for the Common Admission Test (CAT) 2023 exam is set to open today. Candidates will be allowed to make changes to their photo, signature, and test city preferences, but not their email address, date of birth, or mobile number. The process involves logging into the official website, editing the form, and confirming the changes. Over 3.3 lakh candidates have registered for the exam, a 30% increase from the previous year.