Click on the Developer checkbox under the Main Tabs list on the right. Steps to show the Developer Tab When the Excel Options window appears, click the Customize Ribbon option on the left. Get Design Mode in Excel 2010/2013/2016/2019 Ribbon if you do not have a Classic Menu for Office How do I add the Design tab in Excel 2016?
Under Customize the Ribbon and under Main Tabs, select the Developer checkbox.