update doc

docs/sources/dashboards/export-import.md

@@ -25,6 +25,11 @@ add template variables for things like a metric prefix (use constant variable) a
 A template variable of the type `Constant` will automatically be hidden in
 the dashboard, and will also be added as a required input when the dashboard is imported.
 
+### Export with default values removed
+
+If you want to export a dashboard without default values in order to reduce the exported json file size, it is a good idea to check the toggle "Export with default values removed".
+
+When import, the removed default values would be added automatically to the dashboard.
 ## Importing a dashboard
 
 To import a dashboard click the + icon in the side menu, and then click **Import**.

public/app/features/dashboard/components/ShareModal/ShareExport.tsx

@@ -137,7 +137,7 @@ export class ShareExport extends PureComponent<Props, State> {
         <Field label="Export for sharing externally">
           <Switch value={shareExternally} onChange={this.onShareExternallyChange} />
         </Field>
-        <Field label="Export with trimed dashboard json">
+        <Field label="Export with default values removed">
           <Switch value={trimDefaults} onChange={this.onTrimDefaultsChange} />
         </Field>
         <Modal.ButtonRow>