feat(zoom): Allow users to override interface zoom. Fixes #699

internal_packages/preferences/lib/tabs/workspace-section.cjsx

@@ -154,6 +154,11 @@ class WorkspaceSection extends React.Component
         keyPath="core.workspace.showUnreadForAllCategories"
         config={@props.config} />
 
+      <ConfigSchemaItem
+        configSchema={@props.configSchema.properties.workspace.properties.interfaceZoom}
+        keyPath="core.workspace.interfaceZoom"
+        config={@props.config} />
+
       <ThemeSelector />
 
       <h2>Layout</h2>

src/config-schema.coffee

@@ -22,6 +22,12 @@ module.exports =
             type: 'boolean'
             default: false
             title: "Show unread counts for all folders / labels"
+          interfaceZoom:
+            title: "Override standard interface scaling"
+            type: 'number'
+            default: 1
+            enum: [0.6, 0.8, 1, 1.2, 1.4]
+            enumLabels: ['60%', '80%', '100%', '120%', '140%']
       disabledPackages:
         type: 'array'
         default: []

src/flux/stores/workspace-store.coffee

@@ -44,6 +44,9 @@ class WorkspaceStore extends NylasStore
       @popToRootSheet()
       @trigger()
 
+    NylasEnv.config.observe 'core.workspace.interfaceZoom', (zoom) =>
+      require('electron').webFrame.setZoomFactor(zoom)
+
     NylasEnv.commands.add 'body', @_navigationCommands()
 
   _navigationCommands: ->