Circle important data with this tool.

Applying the tool
Select the cell or cell range to be highlighted and click the oval icon. Access this button
from the General Tools toolbar: select Settings. /Toolbars/Add Images & Objects Bar/Draw/

Accessing tool settings
In the SP General Tools toolbar, select Settings / General Tools Settings to open the dialog below.
Select the Draw Oval tab, if you want to customize and finally Apply the settings.