Sorry i could not understand the 1:1 zoom . We do have a non-propotional zoom command which allows you to zoom in by setting your own aspect ration (based on rectangle selection or dynamic).
Could you please share something for reference.
If you go to menu -> view -> operation -> zoom... you can type in any zoom factor that you desire. If you want the graphics 1:1 with real world objects, you will need to calibrate your screen first (menu -> preferences -> visualization -> view/screen -> calibrate).