Hi @trader212
1. & 2. Simply click and hold the left mouse button: you can zoom in and maginfy any area of the chart you like
(a double click anywhere on the chart canvas will bring you back to full view)
Remember that by clicking on a line's legend entry this line is simply hidden on the chart. The graph itself does not recaluclate, and the average for instance (mean or median) will still be displayed including this line. It is only when you select one or more cycles in the 'Exclude individual EAs' dropdown that the chart data reloads, including the 'corrected' avg.