Projects, Experiments and Experimental Steps can be edited at any time, by selecting the Edit icon from the toolbar of the relevant page:
Projects, Experiments and Experimental Steps can be deleted using the Delete option under More tab in the toolbar
Selected entities are moved to the trashcan, from where they need to be removed in order to be permanently deleted from the database.
Please be aware that, by default, only users with Space Admin and Instance Admin role have permission to delete. Default permissions can be modified only by a system admin (see Changing the openBIS capability role map)