How to remove white space in chart studio?

Hi, I’m new to Plotly and a super novice at coding.

I gave up trying to embed on a website the figures I coded in R and Jupyter Notebook using the Plotly package, and decided to use Chart Studio to directly make an interactive sunburst pie chart from the data. The slices of the pie are exactly what I want, but the plot looks very tiny in the preview screen as shown in the first picture. How can I fix this?

Also, how do I change the color such that “Developer” and it’s children are one color, and “Grant” and its children are another (see the second picture)?