import numpy as np
import holoviews as hv
hv.extension('bokeh', logo=False)
x1 = np.random.rand(10)
x2 = 2.0*np.random.rand(10)
x3 = 3.0*np.random.rand(10)
g = hv.Curve(x1, label='l1') *hv.Curve(x2, label='l2') *hv.Curve(x3, label='l3')
go = g.options(title='test',width=600, height=400)
go
go.options(fontsize={
'title': '200%',
'labels': '150%',
'ticks': '150%',
'legend': '150%',
})