Use Unconfirmed Funds
If enabled, the app reads your pending (unconfirmed) balance when preparing a send. Unconfirmed funds are not allowed for merchant or gift-card purchases.
Customize Nonce
If enabled, the transaction nonce could be changed on the send form. This is an advanced feature, use cautiously.
ETH Queued Transactions
If enabled, your wallet queues ETH transactions that share a pending nonce instead of failing them. This is an advanced feature, use cautiously.