An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
Appendix A: Units of Measure, Scientific. Abbreviations, Symbols, Conversions, Variables, and Equations. These abbreviations are for scientific and technical writing, and are not applicable. to general style. Technical abbreviations should be used only in conjunction with a. number or in a table heading; spell out most text uses not associated with a number. If your audience is nontechnical, introduce these abbreviations (spell out in full on.