Zoom Rectangle
The Rectangle command allows magnification by drawing a rectangle around the area of interest in the plot window or grid editor.
Enter Zoom Rectangle Mode
Select the View | Zoom | Rectangle command or the 
button in the plot window or the Grid Editor | View | Zoom Rectangle command in the grid editor to enter zoom rectangle mode. The cursor will change to a 
to indicate that you are in zoom rectangle mode. Hold down the left mouse button and drag the dotted zoom rectangle around the area of interest to magnify it. When the left mouse button is released, the plot window will zoom to the selected area.
Exit Zoom Mode
Click another tool button or press the ESC key to end zoom mode.
Zoom with the Keyboard
You can use keyboard commands to zoom to a rectangle in plot window. The default keyboard command for the Rectangle command is CTRL+R.
See Also
Zoom Realtime