Add Multiline Annotation

1 Use the <br> tag

Use the html tag <br> to break a line after the string section in the text property of an annotation.

import plotly.graph_objects as go

labels = ['Oxygen','Hydrogen','Carbon_Dioxide','Nitrogen']
values = [45.00, 25.00, 10.53, 5.00]

# Use `hole` to create a donut-like pie chart
fig = go.Figure(data=[go.Pie(
    labels=labels,
    values=values,
    hole=.3,
    textinfo='label+value+percent',
)])

fig.add_annotation(
    x=0.5,
    y=0.5,
    text='total values:<br>' + f'{round(sum(values),2):,}',
    font=dict(
        size=16,
        weight='bold'   # alternatively, use "weight=1000" (require plotly v5.24)
    ),
    showarrow=False,
)

fig.update_layout(height=600)

fig.show()

Reference

• How to add multi-line annotation at the center of a donut chart?

• fig.update_annotations(font_weight)