>>Hello,
>>
>>how can I center a title in a report if the length of this title is variable ??
>
>- Put a text box in the title of report.
>- Make sure that it's wide enough for the longest text you want to display in it.
>- Center it using layout tools.
>- In the properties of the textbox set Format to Center justify.

Hi Hans, my dear collegue :-),

I think this is the best solution !