Ctrl-S:                

Saves the current graph format as the standard format for all future graphs of that type.

Shift-Left_Double_Click on Graph Axis

For most plots, this action automatically causes to scale to adjust to the data, showing all data in one view.

Left-click on any legend Item

Highlights that item by making the line 2X thicker.  Stays thick until a mouse-up event is seen in the relevant graph.  The line can stay thick if the mouse-up occurs over a different window.