You should understand what each of the symbols mean.  A triangle icon means that the record has been saved to the disk.  A pencil means that you are currently working on the record but the record has not been saved.  An asterisk appears next to the blank record at the end of every table.  An insertion point is a flashing vertical bar which appears at the point where text is being entered.  The primary key is a field or combination of fields that is unique for very record in the table.