diff --git a/zcash_client_backend/CHANGELOG.md b/zcash_client_backend/CHANGELOG.md
index 09cc70dc8..f4acf6ff8 100644
--- a/zcash_client_backend/CHANGELOG.md
+++ b/zcash_client_backend/CHANGELOG.md
@@ -291,8 +291,9 @@ and this library adheres to Rust's notion of
     `zcash_client_backend::proposal`).
   - `SentTransactionOutput::sapling_change_to` - the note created by an internal
     transfer is now conveyed in the `recipient` field.
-  - `WalletSaplingSpend` use the generic `WalletSpend` instead.
-  - `WalletSaplingOutput::cmu` obtain `cmu` from the `Note` instead.
+  - `WalletSaplingSpend` (use the generic `WalletSpend` instead).
+  - `WalletSaplingOutput::cmu` (use `WalletSaplingOutput::note` and
+    `sapling_crypto::Note::cmu` instead).
 - `zcash_client_backend::data_api`:
   - `{PoolType, ShieldedProtocol}` (moved to `zcash_client_backend`).
   - `{NoteId, Recipient}` (moved to `zcash_client_backend::wallet`).
diff --git a/zcash_client_backend/src/proto.rs b/zcash_client_backend/src/proto.rs
index 1ed156916..17aa8ef90 100644
--- a/zcash_client_backend/src/proto.rs
+++ b/zcash_client_backend/src/proto.rs
@@ -200,6 +200,11 @@ impl TryFrom<&compact_formats::CompactOrchardAction> for orchard::note_encryptio
 
 #[cfg(feature = "orchard")]
 impl compact_formats::CompactOrchardAction {
+    /// Returns the note commitment for the output of this action.
+    ///
+    /// A convenience method that parses [`CompactOrchardAction.cmx`].
+    ///
+    /// [`CompactOrchardAction.cmx`]: #structfield.cmx
     pub fn cmx(&self) -> Result<orchard::note::ExtractedNoteCommitment, ()> {
         Option::from(orchard::note::ExtractedNoteCommitment::from_bytes(
             &self.cmx[..].try_into().map_err(|_| ())?,
@@ -207,16 +212,21 @@ impl compact_formats::CompactOrchardAction {
         .ok_or(())
     }
 
+    /// Returns the nullifier for the spend of this action.
+    ///
+    /// A convenience method that parses [`CompactOrchardAction.nullifier`].
+    ///
+    /// [`CompactOrchardAction.cmx`]: #structfield.nullifier
     pub fn nf(&self) -> Result<orchard::note::Nullifier, ()> {
         let nf_bytes: [u8; 32] = self.nullifier[..].try_into().map_err(|_| ())?;
         Option::from(orchard::note::Nullifier::from_bytes(&nf_bytes)).ok_or(())
     }
 
-    /// Returns the ephemeral public key for this output.
+    /// Returns the ephemeral public key for the output of this action.
     ///
-    /// A convenience method that parses [`CompactOutput.epk`].
+    /// A convenience method that parses [`CompactOrchardAction.ephemeral_key`].
     ///
-    /// [`CompactOutput.epk`]: #structfield.epk
+    /// [`CompactOrchardAction.ephemeral_key`]: #structfield.ephemeral_key
     pub fn ephemeral_key(&self) -> Result<EphemeralKeyBytes, ()> {
         self.ephemeral_key[..]
             .try_into()
diff --git a/zcash_client_backend/src/scanning.rs b/zcash_client_backend/src/scanning.rs
index 1a331630c..b75e80a1b 100644
--- a/zcash_client_backend/src/scanning.rs
+++ b/zcash_client_backend/src/scanning.rs
@@ -913,8 +913,8 @@ pub(crate) fn scan_block_with_runners<
     ))
 }
 
-// Check for spent notes. The comparison against known-unspent nullifiers is done
-// in constant time.
+/// Check for spent notes. The comparison against known-unspent nullifiers is done
+/// in constant time.
 fn find_spent<Spend, Nf: ConstantTimeEq + Copy, WS>(
     spends: &[Spend],
     nullifiers: &[(AccountId, Nf)],
diff --git a/zcash_client_backend/src/wallet.rs b/zcash_client_backend/src/wallet.rs
index e6ffd4a02..329e49870 100644
--- a/zcash_client_backend/src/wallet.rs
+++ b/zcash_client_backend/src/wallet.rs
@@ -109,7 +109,7 @@ pub struct WalletTx {
 }
 
 impl WalletTx {
-    /// Constructs a new [`WalletTx`] from its constituent parts
+    /// Constructs a new [`WalletTx`] from its constituent parts.
     pub fn new(
         txid: TxId,
         block_index: usize,
@@ -130,7 +130,7 @@ impl WalletTx {
         }
     }
 
-    /// Returns the [`TxId`] for the corresponding [`Transaction`]
+    /// Returns the [`TxId`] for the corresponding [`Transaction`].
     ///
     /// [`Transaction`]: zcash_primitives::transaction::Transaction
     pub fn txid(&self) -> TxId {
@@ -251,7 +251,7 @@ impl<Nf> WalletSpend<Nf> {
     }
 }
 
-/// Returns source metadata for a given incoming viewing key.
+/// Source metadata for a given incoming viewing key.
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum KeySource {
     /// The ZIP 32 account identifier and key scope for the key, if the key was derived from the