Cargo Features

[dependencies]
bevy_dev = { version = "0.3.1", default-features = false, features = ["ui"] }
default = ui

The ui feature is set by default whenever bevy_dev is added without default-features = false somewhere in the dependency tree.

ui default

Enables bevy_egui

Affects debug_camera::DebugCameraPlugin.show_preview, bevy_dev::ui