Zoom Extents
You can change the limits of a drawing or a model so that all elements are within them by pressing the Shift+A keys.
After this, all elements will be visible in the work window. This function will also make all of the hidden lines of the model visible.
Note: 
  - In a drawing, the limits can be drawn in a continuous line. The drawing limits drawn as a line, if the Drawing Limits Visible is selected.
- 
        Keyboard function Shift+A search for quickly drawing limits. 
- On the  tab, in the View group, select tab, in the View group, select Refresh. Refresh.
- The F5 key will also calculate new drawing limits in the drawing, but the function also does a lot of other things.

