Hi @twelsh37 Iām a bit late to the party, but maybe interesting:
You can switch on/off the gridlines:
fig.update_yaxes(showgrid=True)
fig.update_yaxes(showgrid=False)
To change the style of the grid:
import plotly.graph_objects as go
fig = go.Figure(go.Scatter(x=[1,2], y=[1,2], mode='lines+markers'))
fig.update_xaxes(gridwidth=3, gridcolor='red')
fig.update_yaxes(griddash='dash', gridcolor='black', gridwidth=2)
fig.show()