The Formula tab in the Spreadsheet Editor tab allows working easily with all functions.
The corresponding window of the Online Spreadsheet Editor:

The corresponding window of the Desktop Spreadsheet Editor:

Using this tab, you can:
- insert functions using the Insert Function dialog window,
- quickly access Autosum formulas,
- access 10 recently used formulas,
- work with formulas classified into categories,
- work with named ranges,
- trace precedents and dependents,
- show formulas in the cells instead of the formula results,
- use the Watch Window,
- use the calculation options: calculate the entire workbook, or the current worksheet only.