One of the most useful functions in Looker Studio is called "Paste styles only." This function is a real-time saver, allowing you to copy any chart and paste all styling information into a chart of the same type.

Style coherence across an organization

Looker Studio doesn't provide a centralized tool to achieve coherent styling across multiple reports. Each report has its theme settings, and each chart has its styling information. 

At Supermetrics, we created a Looker Studio styling repository for each report series we maintain. This repository—called the Toolkit—contains sample configurations of each chart type used in these reports.

Whenever someone inserts a new chart into a report, they can simply copy a chart from the repository and paste the styling information into the newly created chart.