I am refering to all items in the inventory or in an object

While clearly related they are not identical as resolving that one whould not be adiquate to resolve this one

First, the abillity to set the permission of all selected items at once, nonrecursively. This is only a GUI change and should be relatively simple – the hardest part being making it clear visually, while still providing the ability to go through the set one-at-a-time as we currently can. For example, add a band to the bottom or top of the current window, outside the tabbed content, that says "Set all...", with checkboxes.

Second, the ability to set permissions recursively. This would be very tricky to get right, so it should be a separate item. It would need to be clear exactly what kinds of recursion are supported:

1) selected objects' or prims' inventories
2) if selection includes objects, inventory of each prim in each object
3) inventory of contents of objects in inventory (!!)

The possibilities would most likely be different depending on whether the selection is in inventory or inworld. Most likely, recursion would be supported only for in-world objects.

Item 3 would be the trickiest, and perhaps should be postponed to a 3rd phase.