You can submit elements to code review both explicitly (as when selecting one or more elements from the File Browser, for example) or implicitly (as when selecting all the elements in a change package associated with an issue, for example).
Notice the two
Code Review buttons
highlighted in this particular view, one on the
Issue Edit form toolbar, another on the
Changes tab toolbar.
AccuRev responds differently depending on which button you click:
The following summarizes whether a view allows you to select elements implicitly, explicitly, or both.