List your features in a expanded and tree-like format
λ cargo feature-tree
zmix
├── PS_Signature_G1
├── PS_Signature_G2
├── asm
│ └── std
│ ├── ver_enc
│ └── PS_Signature_G2
├── default
│ └── std
│ ├── ver_enc
│ └── PS_Signature_G2
├── portable
│ └── std
│ ├── ver_enc
│ └── PS_Signature_G2
├── std
│ ├── ver_enc
│ └── PS_Signature_G2
└── ver_enc
λ cargo feature-tree default
zmix
└── default
└── std
├── ver_enc
└── PS_Signature_G2
cargo install cargo-feature-tree
cargo feature-tree <FEATURE>
cargo feature-tree path-to-folder-containing-cargo.toml
cargo feature-tree path-to-explicit-cargo.toml