zed/assets/settings/initial_user_settings.json

// Folder-specific settings
//
// For a full list of overridable settings, and general information on folder-specific settings, see the documentation:
// https://docs.zed.dev/configuration/configuring-zed#folder-specific-settings
//
// To see all of Zed's default settings without changing your
// custom settings, run the `open default settings` command
// from the command palette or from `Zed` application menu.
{
  "buffer_font_size": 15
}