A method includes obtaining blood glucose measurements and blood glucose times of a patient from a blood glucose meter and executing a patient management program configured to display on a screen a graphical user interface having a trend window of the blood glucose measurements on the time line. The patient management program is configured to receive, in the trend window magnifying inputs for a magnification window superimposed on a segment of the timeline to specify a date range for a magnified window. The patient management program is further configured to display the magnified window including the blood glucose measurements of the patient from the specified date range and display a first information window including quantitative information associated with the blood glucose measurements from the specified date range.