I am working on a public transit app for Android. Look at the screenshot - the button with a wrench icon opens advanced options. In advanced options you can set which transport mode to use (bus, tram, metro, ...) and things like that.
1) Do you have an idea for a more suitable icon (I was told that the current one looks like application settings)?
2) What about implementing advanced options differently?
3) Any other feedback about the screenshot?