Revision history of "File:You may use the drop-down menus to change the privacy settings for each of the items listed. Note- Depending on your institutional Profile settings, some of these privacy settings may be locked or unavailable.png"

From EdTech Help

Diff selection: Mark the radio boxes of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.