The information in this article is out-of-date, and is only being retained for reference purposes. For more up-to-date information on this topic, see here.
You have the option to adjust gas price and gas limit when sending Ether and tokens.
If you have learned about gas price and gas limit, and wonder how to adjust them on MetaMask, here’s how:
On the “Send ETH” or “Send Token” screen, click Fastest, Fast, or Slow next to Transaction fee:
To customize the transaction fee, select Advanced Options, and you will be able to manually enter Gas Price (GWEI) and Gas Limit.