Here is how to change font size of a pie chart title in looker studio
- First click on the file name from the reports list to open it
- Then click on the "Edit" button in the top toolbar to enter edit mode
- Next click on the "Manage pages" button in the toolbar to view report pages
- Then click on the page name in the sidebar Report Pages panel to navigate to that page
- Next click on the pie chart element to select it and open its properties panel
- Then click on the "Font size" dropdown in the Style tab of the right sidebar properties panel
- Finally select the an option from the font size dropdown menu









