[SOLVED] Allow or not the modification of some fields

Hello,

I would like to know how to allow or not the modification of some fields by a user ?

For example, i created a task for a ressource.
When this ressource opens the task, she has the possibility to modify the content of fields in description part (name, activity type, project, ...). For me, only the project manager can do that !? No ?

This ressource was added as a "Team member" in the project.

I searched in the "Access rights" menu, but i found nothing to manage this.

Could you help me on this point, please.

Thanks for your answer Babynus