yaml.customTags.json

// include snippet below in your User Settings (Ctrl + ,)

{
    "yaml.customTags": [
        "!And",
        "!If",
        "!Not",
        "!Equals",
        "!Or",
        "!FindInMap",
        "!Base64",
        "!Cidr",
        "!Ref",
        "!Sub",
        "!GetAtt",
        "!GetAZs",
        "!ImportValue",
        "!Select",
        "!Split",
        "!Join"
    ]
}