Hi,
I'm Gustavo, an independent advisor. I'll be glad to help you.
Chart tools comprise of two tabs DESIGN and FORMAT. When you select a chart, these tabs are available.
If this option does not appear for you click File > Options > Customize Ribbon, under Customize the Ribbon, select Tool tabs, confirm you have checked Design and Format under Chart Tools.
https://answers.microsoft.com/en-us/msoffice/fo...
I hope this information helps.
All best!
Attachment: chartTools.png