             // upload higher res image i.e. max 1024
             params.img_settings = ViImageSettings(setting: .highQualitySetting)
             params.limit = self!.limit
+            // for retriveing additional meta data e.g. for displaying in detail page
+            // params.fl = ["category"]
+            
             controller.searchParams = params
             
             controller.croppingEnabled = true

            let similarController = ViFindSimilarViewController()
            
            params.limit = self.limit
            
            similarController.searchParams = params
            

    // MARK: ViSearchViewControllerDelegate
    func didSelectProduct(sender: AnyObject, collectionView: UICollectionView, indexPath: IndexPath, product: ViProduct) {
        alert(message: "select product with im_name: \(product.im_name)" )
        
        // print out meta dict. you can use this for displaying product details
        if let dict = product.metadataDict {
            print("\(dict)")
        }
        
    }
    
    func actionBtnTapped(sender: AnyObject, collectionView: UICollectionView, indexPath: IndexPath, product: ViProduct){
