When you press the edit button on the file view, this screen will open with the data display that goes with the record you have highlighted. The field name will be in the left column, and the data in the right.
You can double click on any value you see, and that field will be opened in Edit mode. Some values will show .T. or .F. for True or False. To change the value just enter a T or F without the dots. Some fields have a lot of text, and clicking those fields will popup a box for editing the text.
Make your change and then press the Tab key. Your changes will show up on this form as modified. When you complete your changes to this record, press the Save _ Exit button. You can use the Exit Edit button to leave without making any changes.