SETTINGS

ADD/MODIFY PROXY LISTENER INTERFACE & PORT

BURP > Proxy > Proxy Settings > Tools > Proxy > Proxy Listeners

INTERCEPT IMAGES

BURP > Proxy > Proxy Settings > Tools > Proxy > Request Interception Ruules
 * disable the "no image interception rule"
    - by default, burp doesn't intercept images

INTERCEPT SERVER RESPONSES

BURP > Proxy > Proxy Settings > Tools > Proxy > Intercept Server Responses
 * enable the rule "Intercept responses based on the following rules..."

DISPLAY HIDDEN FORM FIELDS

BURP > Proxy > Proxy Settings > Tools > Proxy > Response Modification
 * enable "unhide hidden form fields"