1. creating your own [`matplotlibrc` file](https://matplotlib.org/stable/tutorials/introductory/customizing.html#defining-your-own-style), or

2. updating values stored in the dictionary-like variable `plt.rcParams`

Let's change the style of our overlaid density lines

Let's change the style of our overlaid density lines using the second method

```{code-cell} python3

from cycler import cycler

# set to the default style sheet

plt.style.use('default')

#set default figure size

plt.rcParams['figure.figsize'] = (10, 6)

# update linewidth

# You can update single values using keys:

# Set the font style to italic

plt.rcParams['font.style'] = 'italic'

# Update linewidth

plt.rcParams['lines.linewidth'] = 2

# add horizontal grid lines

plt.rcParams['axes.grid'] = True

plt.rcParams['axes.grid.axis'] = 'y'

# update colors for density lines

plt.rcParams['axes.prop_cycle'] = cycler('color',

['dimgray', 'slategrey', 'darkgray'])

# You can also update many values at once using the update() method:

parameters = {

# Change default figure size

'figure.figsize': (5, 4),

# Add horizontal grid lines

'axes.grid': True,

'axes.grid.axis': 'y',

# Update colors for density lines

'axes.prop_cycle': cycler('color',

['dimgray', 'slategrey', 'darkgray'])

}

plt.rcParams.update(parameters)

```

```{note}

plt.style.use('default')

#set default figure size

# Reset default figure size

plt.rcParams['figure.figsize'] = (10, 6)

```