Depth 0 is the top of the drawing order, with increasing depths being underneath objects with smaller depth. The maximum depth is 999.
While the depth feature has been a part of
xfig for a long time, there is now a panel to the right of the canvas
which allows the user to enable or disable editing and displaying
depth levels.
This panel may be hidden or shown by selecting Show depth manager
from the View menu.
Clicking on the checkbox area of a depth indicator will turn on or off the display and editing of objects at that depth. By clicking on one checkbox and holding down the mouse button while dragging the mouse up or down over other depth checkboxes, multiple depths may be enabled or disabled at one time.
If you click on a checkbox that is ON and drag the mouse over other checkboxes, they will be turned OFF regardless of their initial state. Conversely, if you click on a checkbox that is OFF and drag the mouse over other checkboxes, they will be turned ON.
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