Hand tool and zoom resume

[MG70]

I apologize for this easy looking question,  but neither the documentation nor my own tests seem to point me to a clear answer.

I have a waveform graph and I am using the zoom and hand tool on the graph palette.

1. After applying the hand tool, how can I resume to the original graph?

2. I zoom a part of the graph more than one time consecutively, let's say twice. After the secodn zoom, I would like to resume to the result of the first zoom. 
The same way in which generally the zoom-in and zoom-out functionalities work.

On the graph palette, the left bottom icon of the zoom functions, offer just the possibility to resume to the initial version of the graph.

I couldn't find a way to achieve an incremental zoom-out as described above?

Is there any?

Thank you!

MG.

[crossrulz · Accepted solution]

1) Use the Zoom to Fit

2) You will need to programatically make this.  When you zoom in, store the X and Y scale data (max and min).  You can then make a button to go back to the previous zoom by then setting the scale data with the values you stored.

[MG70]

Thanks crossrulz!

MG