PNG plot generates screen output and opens an interactive session. Using buttons/slider you can 1) navigate back and forth in time, 2) resize image, 3) select time interval for its zooming or storing in time table, zoom on Y Left Axis 4) extend/shift time interval, 5) save plot on your disk, 6) link the plot with other plots, 7) access to Hubble Space Telescope images.
In case of Time Table input you navigate over Time Table intervals.
Zoom In Time Interval
After right clicking Zoom On Time Axis in the context menu select interval of interest by clicking image. You can either 1) apply/undo zoom or 2) insert selected interval into new or existing time table. Time Table name is to be typed (or dragged/dropped) in the Time Table Name field.
Extend/Shift. Time extention/shift value can be positive (interval extention, positive time shift) or negative (interval shrinking, negative time shift).
You find the description of 6) Linked to Multi Plot Mode in the MultiPlot Mode section and 7) access to Hubble Space Telescope images in the Access to Hubble Images section.