This still works if you use classic themed layouts.
For the other themes, you may still be able to get this to work if you enter layout mode and drag the new right hand border for you layout much further to the right, but test it and see. I can imagine situations where the use of auto-resize anchors may not produce the results you want if you do that...
Thanks for the fast response Phil. I had started with a 'Blank Layout' figuring that would be sufficient. Based on your advice I also tried changing the theme of the layout. Changing to 'Basic > Classic' worked. Thanks!
Strangely, changing to either of the 'Classic Refined' themes did not work. So it looks like to get full window width in browse mode, the theme must be set to 'Basic > Classic'. I sure hope FIleMaker never decides to get rid of that theme!? Thanks Phil.
changing to classic was only one of two suggestions that I made. The other is to drag the right hand layout boundary--which does not exist in Classic, further to the right--maybe very far to the right if you deal with large monitors.
Thanks Phil. Yep, I did notice you're other suggestion as well. I just liked the 'Classic' approach better right now.