- It is possible that there is a blank line on top of the detail grid if no Controller.Caption text is provided and if there is no paging displayed in the controller. You can hide the controller by setting Controller.Position to cpNone.
- You can center the title of a detail grid by setting the Controller.Alignment to taCenter.
About the blank line your tip was correct, and it worked perfect!
In the second problem the 'Controller.Alignment' property set to 'taCenter' didn't fix the issue, but I found the property 'ColumnHeaderAlignment' of each column and there I could set the title alignment to 'taCenter' as you pointed out.