Adding your Token as a Default Token on MyEtherWallet (MEW)

If you are a person experimenting with tokens, you can add a token to your local version of MyEtherWallet
If you have a token that other people also have, or will have in the coming days, you can add it to our site. You will need to provide:

Name of your token
Symbol of your token
Address of your token
Decimals of your token
Your official Website
Your direct customer support email
    Due to high numbers of token sale holders NOT providing support to their investors, we will remove your token if you do not help the people who made you millionaires.
Optionally, you may also include your blog, social media sites, chat channels, your logo, etc.

1. Submit your Tokens as Default Tokens

   Go to https://github.com/MyEtherWallet/ethereum-lists/blob/master/tokens/tokens-eth.json
   *If your token exists on a different network, you can add them here
   Login or join Github
   Click the pencil icon in upper right
   Scroll to the letter of your token (they are in alpha order)
   Copy an existing token starting at the { and ending with },
   Remove any information that you copied that isn't yours
   Add your address, decimals, name, and symbol
   Add your website
   Add your support email
   Add any other additional links
   At the bottom under "Commit changes" type "Added YOUR_TOKEN_SYMBOL Token to Defaults" in the title box
   In the bigger box below that: add any additional information you'd like to let us know about
   Click the green "Propose File change" button
   This next page is a review of what you did
   Click the "Create Pull Request" button.....twice
   That's it. You successfully made a new pull request! Tell all your friends
   We will now review it and pull it in and it will be made live on the site. We may also ask you questions if something is confusing for whatever reason

2. Add your token sale address & manual gas limits to ensure a smooth sale

   Go here https://github.com/kvhnuke/etherwallet/blob/mercury/app/scripts/customGas.js
   Find an existing entry that is over, or use our donation address (the top one)
   Replace the information with your information:
   Address: The address users will be sending to
   Gas Limit: The gas limit you are recommending that ensures there will be no Out of Gas errors
   Data: Optional. If there is a standard data field, add that string
   Message: Optional. If people need to generate data, include a note here to remind them. You can include the block start times or date and what token sale it is for
   At the bottom under "Commit changes" type "Manual gas limits for upcoming _ token" in the title box
   Any other notes you would like us to see can be included below.
   Click the green "Propose File change" button
   This next page is a review of what you did
   Click the "Create Pull Request" button.....twice
   That's it. You successfully made a new pull request! Tell all your friends
   We will now review it and pull it in and it will be made live on the site. We may also ask you questions if something is confusing for whatever reason

3. Adding your Contract / ABI

We now provide users with the ability to enter the address and it auto-populate with the ABI. If you have a contract that IS NOT YOUR ERC-20 TOKEN CONTRACT that users WILL ACTUALLY BE interacting with:

https://github.com/kvhnuke/etherwallet/blob/mercury/app/scripts/abiDefinitions/ethAbi.json
Copy from { to },
Replace information with your contract name, address, and ABI.
At the bottom under "Commit changes" type "Added YOUR_CONTRACT_NAME contract ABI" in the title box
Any other notes you would like us to see can be included below
Click the green "Propose File change" button
This next page is a review of what you did
Click the "Create Pull Request" button.....twice
That's it. You successfully made a new pull request! Tell all your friends
We will now review it and pull it in and it will be made live on the site. We may also ask you questions if something is confusing for whatever reason

Thank you.

Original Source: https://myetherwallet.github.io/knowledge-base/tokens/token-creators-add-your-token-to-myetherwallet.html