Similar to Improv, formulas can be represented as icons in Numbers, allowing them to be dragged about the sheets. One noteworthy example of this is a sidebar which contains the sum, average and other basic calculations for the current selection in the active table. These serve a function similar to the sum that appears at the bottom of the window in Excel. However, the user can drag one of the function icons from the sidebar into the sheet to make the calculation appear in that location. In another nod to Improv, the Formula List shows all of the formulas in the spreadsheet in a separate area, and allows edits in place or easy navigation to their use in the sheets.