Fixed axes in output

Hello,

For plotting purposes, I would like to keep a constant zoom and axis distances for different output files from the left to (1 50) and (-20 50); right now I'm manually clicking and zoom in to the desired values but is not as accurate as required and time-consuming for several files. Due to this, I'm wondering if there is an easy way to set up this through the command line or directly in the ouput window. 

Thanks for your support,