Hi Rob,
There is no setting you can access to change the Y scale of a DIAdem VIEW window. VIEW will always autoscale the window to the data displayed in the window.
There is a way though to change the Y scale:
Choose the 'Frame cursor' in the toolbar, select the y scale you wish to display by moving the upper and/or lower frame cursor and click on the 'Zoom' or 'Scroll' button in the VIEW window you are using.
I hope this helps you with your task,
Otmar
Otmar D. Foehner