Annotation¶

update annotation¶

import plotly.graph_objects as go

fig = go.Figure()
fig.add_trace(go.Scatter(x=[1, 2, 3], y=[4, 5, 6]))
# Add an annotation with the same font as the subplot title
fig.add_annotation(
    text="Annotation Text",
    x=2, y=5,
    # arrowhead=2, arrowsize=1.5,
    font=dict(
        family="Arial",  # Set the font family to match the subplot title
        size=14,  # Set the font size to match the subplot title
        color="black"  # Set the font color to match the subplot title
    )
)

fig.update_layout(
    title='Subplot Title',
    xaxis_title='X Axis Title',
    yaxis_title='Y Axis Title'
)
fig.layout.annotations[0].update(text="Stackoverflow",x=1,y=5, xanchor='left', yanchor='bottom')

fig.show()

https://plotly.com/python/reference/layout/annotations/

• x: X-coordinate of the annotation.

• y: Y-coordinate of the annotation.

• xref and yref: Specifies whether the coordinates refer to the "paper" or "axes" domain.

• text: The text content of the annotation.

• showarrow: Boolean indicating whether to draw an arrow from the annotation to the specified point.

• arrowhead: The arrowhead style (options: 0, 1, 2, 3, 4, 5, 6).

• arrowcolor: Color of the arrow.

• arrowwidth: Width of the arrow.

• ax: X-coordinate of the arrow tail.

• ay: Y-coordinate of the arrow tail.

• bordercolor and borderwidth: The color and width of the annotation border.

• bgcolor: The background color of the annotation.

• opacity: The opacity of the annotation.

• font: Dictionary specifying the font properties of the text.

• align: Text alignment within the annotation (options: "left", "center", "right").

change subplot title location¶

fig.layout.annotations[0].update(
    text='Stackoverflow',
    x=-0.01, y=1,
    xref='paper', yref='paper',
    xanchor='left', yanchor='bottom',
)