Outil supprimer

The "delete" tool works very badly or not at all.

By @PatMonf

Can you be more specific?

What are you finding dificult to delete?

Is it a selection of part of an image?

Do you definitely have a pixel layer selected, or even the correct layer with the content you wish to delete?

Is the selection feathered?  Check the Options Bar to see if there is a value in the Feathered field?

Hit the Q key to go into Quick Mask. Is the red area sarply defined, or does it have a blurred outline?

This would make the partially selected area difficult to delete.