In a complex drawing, you may have objects stacked up, one on top of the other, with the result that a particular object is hidden by one or more other objects above it. You can rearrange the stacking order of objects (move an object to the front or to the back of the stack) by selecting the object, clicking Modify > Arrange and selecting the appropriate Bring Forward or Send Backward option, or by right-clicking the object and selecting Arrange from the context menu, then selecting from the list of Bring Forward or Send Backward options.
On the Drawing toolbar, the Arrange tear-off menu on the
button contains the above options. A keyboard shortcut is Shift+Ctrl++ to bring an object to the top, and Shift+Ctrl+− to send an object to the bottom.
Draw also provides tools for aligning multiple objects; details are given in the Draw Guide.