Panel
Panel[expr] displays as a panel containing expr.
Panel[expr,title] gives the panel the specified title.
Panel[expr,title,pos] places title at a position specified by pos.
Panel[expr,{title1,title2,…},{pos1,…}] places titlei at position posi.
Panel[] displays an empty panel.
Please visit the official Wolfram Language Reference for more details and examples on core symbols.