Use math literal subscripts for naming purposes only. You can use literal subscripts to create names like Vector1 and H2O.

To enter a literal subscript as a named variable, on the Math tab, click Subscript. Then toggle to where you want to insert the subscript. Alternatively, press CTRL+-

Although literal subscripts appear similar to matrix indices that you insert with the index operator, they are different in function. Literal subscripts are part of a variable or function name, while matrix indices assign and return value to a vector or matrix element. When you click a literal subscript, you see the cursor. When you click matrix indices, you see a blue open rectangle.

To insert a literal subscript symbol not available on your keyboard, use a keyboard shortcut or the Character Map. Do not use the Constants menu. For example, to insert the ∞ symbol, press CTRL+SHIFT+Z in the literal subscript placeholder. If a keyboard shortcut is unavailable for your symbol, see To Insert Characters Using the Character Map.