Okay, I have pics below to describe the situation.
One is layout mode, and other is browse mode.
Basically, as you can see in the 1st pic, layout mode, I have the layout sized at 1024 x 768. This way I can fit the monitor size that is small as well as larger. I have everything anchored. The portal and the tab control are both anchored to stretch left and right. In layout mode, the portal is sized to fit the layout. If you see, there is no more space to put more fields as the portal space is full.
However, when you go to browse mode, as in the 2nd pic, the portal extends and more space is available for the fields.
I would like to keep the layout size to what it is now because we have some computers that have small monitors and large monitors. I would like this to work with all sizes.