How to Display toolbox

Hello !

i face a strange problem, i closed the 'boxes' like 'objects explorer', 'results' , 'results list', 'toobox' to see my model in fullscreen, and now, if a want to display back trhis boxes, the "toolbox' doesn't appear anymore in the 'View' Menu :(
i itried to close and reopen workspace and model, no way to see the option back in the menu :(
Please help ! i 'm completely 'locked'.
very thanls and take care

English or French ;)