Overlay

Overlay[{expr1,expr2,…}] displays as an overlay of all the expri.

Overlay[{expr1,expr2,…},{i,j,…}] displays as an overlay of expri, exprj, ….

Overlay[{expr1,expr2,…},{i,j,…},s] allows selections to be made and controls to be clicked in exprs.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.