# Customizing the Visualization¶

One advantage to PySurfer over Tksurfer is that you are not limited to a single look for the visualization. Of course, being built on Mayavi, PySurfer is in theory completely customizable. However, we also offer a few preset options so that you do not have to delve into the underlying engine to get a different look.

## Changing the display background¶

The display background can take any valid matplotlib color (i.e., it can be a tuple of rgb values, an rgb hex string, or a named HTML color).

## Changing the display size¶

The default display window is 800px by 800px, but this can be configured using the size keyword argument in the Brain constructor. size should either be a single number to make a square window, or a pair of values, (width, height), to make a rectangular window.

## Changing the curvature color scheme¶

By default, a new Brain instance displays the binarized cortical curvature values, so you can see which patches of cortex are gyri and which are sulci (pass curv=False to the Brain constructor, or use the -no-curv switch in the command-line interface to turn this off). There are four preset themes for the curvature color scheme, which you can pass to the cortex parameter in the Brain constructor: classic, bone, high_contrast, and low_contrast:

Note that, in each theme, the darker color signifies sulci.

It’s also possible to customize this further by passing the name of a mayavi colormap or a colormap name along with the endpoints of the colormap and whether it should be reversed.

Additionally, you can load a continuous curvature map with the Brain.add_morphometry() method.

## How to use these themes¶

These options can be selected either as keyword arguments to the Brain constructor,

>>> from surfer import Brain
>>> b = Brain('fsaverage', 'lh', 'inflated', cortex='bone')


or as options in the command-line interface:

.. code-block:: bash

\$ pysurfer fsaverage lh inflated -background slategray -size 400