Thanks for your fast answer Michael.

So it is not possible to juste delete the font trim. As the trim affect all the contour it will be considered as a one trim.
So if i want to rebuild this patch without the font hole, but keeping the other trim what is my best option ?
I need to :
- untrim the patch
- recreate a new projection curves by rebuilding the actual contour curves but without the font
- then reproject the reconstructed curves and trim again ?

Cheers