Modifying content width of the Sphinx theme 'Read the Docs'

Question

I am using \'Read the Docs\' Sphinx theme for my documentation. In the original theme, given below

http://read-the-docs.readthedocs.org/en/latest/theme.html

Answer 1

Just in case someone is still searching for a simple answer... combining the ideas from https://samnicholls.net/2016/06/15/how-to-sphinx-readthedocs/ and the above suggestions i found that the most easy way of getting a custom window-width is the following:

in conf.py add a function that adds your custom stylesheet (just add the following lines):

def setup(app):
    app.add_css_file('my_theme.css')

and then create a file called my_theme.css in the _static folder that simply contains the following lines:

.wy-nav-content {
max-width: 1200px !important;
}