Specify the "Y" coordinate that represents the number of pixels the pane area should be from the top of the outside of the dialogs contained in this category. You can also click and drag the pane to the exact location you want it located in the dialog, and this coordinate will update accordingly.

TIP: You can use this property, along with the X property, to easily change the pane area location of all of your dialogs to the same location. Click and drag the pane area of one dialog to where it should be located, then copy its X and Y property values to all of the other categories of dialogs.