There are times you may have painstakingly selected some objects carefully from various different classes, from various locations on the site. Now, at that time, you may notice that you wanted to do something ONLY with the current object and not the entire selection set.
What would you do?
You can tick this checkbox that would temporarily suspend the selection set – though the selection is still visible and valid; the editing action will now go only on the current object
Press F1 inside the application to read context-sensitive help directly in the application itself