When designing a tab page in the UI editor usually the total height and width needed to nicely place all the controls can be calculated using the heights of the individual controls plus some distance in between the controls.
One may end up with a number for the height of the panel (excluding the top positioned tab) of say 160 pixels. Unfortunately, in the UI editor it is not possible to set this value. All that is possible is setting the height of the complete panel tab including the tab height (to say 181). It would be nicer having the possibility to either set the height of the panel including the tab (and the usable panel height will adapt) or to set the height of the usable panel height and the total height of the panel tab will adapt accordingly. Then moving the tab from the top to the left the usable panel height would remain constant.
A workaround has been given by Roberto here so this suggestion is not the most urgent wish but still would increase user friendlyness of the UI editor...
