Positioning subscreen

Hi experts,

In a main screen i have 3 subscreen

Top subscreen

Middle subscreen

Bottom subscreen.

Based on the data if i'm not calling Top subscreen the Middle is moving up and taking the position of top and bottom move up to the place of middle which is good.

Now based on this i created similar subscreens in a main screen

Left Subscreen | Middle subscreen | Right subscreen.

If i'm not calling the left subscreen ,the middle subscreen is not moving to left.i do not know why .Basically i'm trying to

create 3 subscreens vertically and based on the data it is required to move to the left for displaying details.

Any ideas,what i'm missing or is there any other way to do this.

Thanks,

Linda