I can't edit a value in a form

If the answer field is grayed and you can't edit the value it means the item is read-only.

Although a read-only item can't be manually edited, the value it contains can be updated. Values in read-only fields are populated based on other information you add to the form. So all you have to do to update the value in a read-only field is to edit the answers that generated the read-only value.

For instance, the Body Mass Index (BMI) is automatically calculated based on a subject's height and weight. If you want to edit the BMI value (because you noticed an error) you need to update one or both of the values you entered for Height and Weight. The read-only value will automatically get updated.

Note:

If a read-only value in a form is calculated based on data entered during a previous visit, you need to go back to that visit and edit the answers accordingly to update the read-only field.