Is it possible to create some sort of symbol legend.(including wall sections, building sections, elevation symbols, etc)

Yes it is.

How will you plz explain it to me ....

Add representative symbols to the drawing and provide a description of what each represents.  Or create one as a separate drawing and xref into any drawing where you need a legend.  Or create it as a block and put it on a Tool Palette.  Drag and drop it into any drawing that requires a legend.  Your choice.John Connor2012-07-30 23:40:45