A drawing’s extents are defined by its coordinate extremities. Every line, piece of text, luminaire and all other entities have 3-dimensional coordinate values (X, Y, Z), the range of these values is used to compute the drawing extents. The smallest and largest coordinate values dictate the drawing extents in the X, Y and Z dimensions. When Zooming Extents, the overall drawing is sized to fit within the confines of the current view selected on your computer's screen. This command is functional in plan, elevation and isometric views. The drawing will automatically be centered within the View boundaries.
The Zoom-Extents command is transparent - it may be selected within another command without canceling the current command.
From the View menu choose Zoom-Extents.