Active Level
Sets the Active Level, the level on which an element is placed, and changes the levels of selected elements. This drop-down list box can also be used to toggle the display of a level in all views and to toggle its lock status.
Clicking Filter opens the Recall Level Filter dialog that is used to apply existing filters.
Note: The above key-ins do not affect the level attributes of elements in a selection set. Use the Level drop-down list on the Attributes ribbon group to make level changes to a selection set.