Auto Refresh
Auto-refresh will refresh the curve(s) if any settings influencing the viewed plot(s) are changed.
Examples of settings that will cause auto refresh are the settings in the dialog box that pops up by clicking in the active plot, the toolbar buttons influencing the plotting and changing the time window size clicking and dragging the mouse.
Note that the settings in Plot->Chart Settings for Active Plot... are not controlled by the auto-refresh, as these settings are always immediately updated. E.g. if you change the plot background gradient colors in the Plot->Chart Settings for Active Plot... dialog box, this will be done immediately, even before closing the dialog box.
The type of refresh depends on what is checked in the sub-menu as shown below
Each of these is described below.
