Point your mouse cursor on the note icon (or click it) in the transcript PDF document to see the popup with grades explanations:

Note: The icon might look different, it depends on viewers. If you don't see this icon at all (ex: using browser's PDF viewer), please try to open PDF document using another viewer (e.g. Adobe Acrobat Reader, Foxit Reader).
Possible grade values:
| Grade | Value | 
| No Grade | There is no grade yet | 
| Missing | Some course settings are missing | 
| In Progress | A student has started a course but hasn't completed it yet | 
| I | Incompleted course | 
| W | Withdrawn from course | 
| T/TO | A course is not assigned to a student and the T/TO grade is entered manually | 
Here are all grades that need to be fixed, their short explanation and solution:
| Grade | Explanation | Solutions | 
No Grade (Dropped before Course Start Date)  | Official Date of Withdrawal/Expulsion is earlier than the first class date in this course.  | Input grade manually on the Grading: View or Record Grades page (Edit Final Grade action). | 
| No Grade (Classes are not scheduled) | Classes are not scheduled yet.  | Configure class schedule on the Group "Name": Education Group Details page (Attendance: Class Schedule action). | 
No Grade (Grade Components are not configured)  | Grade components are not configured yet.  | Configure grade components on the Group "Name": Education Group Details page (Grading: View or Record Grades action). | 
No Grade (Course is not started)  | Course is not started yet.  | Wait for the course's start date. | 
| No Grade (Course is not assigned to student) | Course is not assigned to student yet.  | Assign courses on the Student "Name": Education - Courses in Student Group page. | 
Missing (Letter Grades are not configured)  | Letter grades are not configured yet.  | Configure letter grades on the Grading: Letter Grades page. | 
| Missing (Student has no Final Grade) | Grades are not inputted but student already has Is Final Grade.  | Remove Is Final Grade, input grades and finalize grades again on the Grading: View or Record Grades page. | 
In Progress (Student doesn't have Is Final Grade)  | Student doesn't have Is Final Grade yet.  | Finalize grades on the Grading: View or Record Grades page. | 
| In Progress (Grade Components are not configured) | Course is already started but grade components are not configured yet. | Configure grade components on the Grading: Grade Components page. | 
| In Progress (Student has absences) | Course is already started and student has absences.  | View and edit absences on the Group "Name": Attendance page. | 
Grade  | Explanation  | Possible Actions | 
| I (Entered manually) | Grade was inputted manually. | Remove manual grade on the Grading: View or Record Grades page (Edit Grade action). | 
| I (Student doesn't have Is Final Grade) | Course is already completed but student doesn't have Is Final Grade yet. | Finalize grades on the Grading: View or Record Grades page. | 
| I (Student has absences) | Course is already completed but student has absences. | View and edit absences on the Group "Name": Attendance page. | 
| I (Student was dropped) | Student was dropped and Official Date of Withdrawal and Official Date of Expulsion are empty. | Input Official Date of Withdrawal or Official Date of Expulsion on the Student "Name": Data in Group page. | 
| I (Student was transferred) | Student is in the Transferred, Dropped Transferred, or LOA Transferred stage. | Check the grades in the group that the Transcript PDF is being created for. | 
| W (Entered manually) | Grade was inputted manually. | Remove manual grade on the Grading: View or Record Grades page (Edit Grade action). | 
| W (Student was dropped) | Student was withdrawn from group after course's start. | Input grade manually on the Grading: View or Record Grades page (Edit Grade action). | 
T/TO  | Course is not assigned to student yet.  
  | Input grade manually on the Grading: View or Record Grades page (Edit Grade action). | 
You can read more about Grades and Attendance in the following article How to configure and enter Attendance and Grades?