You can find proxy settings in File -> Settings. Click Enable Proxy and enter the Proxy variables values.
You can configare the proxy server using the following variables:
http_proxy — the proxy IP address for sending requests without SSL;
https_proxy — the proxy IP address for sending requests with SSL;
no_proxy — a list of hosts that don't need to use a proxy.
no_proxy values examples:
*google.com - don't send HTTP / HTTPS requests to Google;
google.com:443 - google.com:443 - don't send HTTPS requests to Google, but send HTTP requests to Google;
google.com:443, yahoo.com:80 - google.com:443, yahoo.com:80 - don't send HTTPS requests to Google, but send HTTP requests to Yahoo!
*- ignore the https_proxy / http_proxy environment variables.