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.
An abbreviation is a shortened form of a word or phrase. It consists of a group of letters taken from the word or phrase. For example, the word abbreviation can itself be represented by the abbreviation abbr., abbrv., or abbrev. In strict analysis, abbreviations should not be confused with contractions, crasis, acronyms, or initialisms, with which they share some semantic and phonetic functions, though all four are connected by the term abbreviation in loose parlance.:p167An abbreviation is a