Update README.md

Author: Mnikley

README.md

@@ -15,8 +15,9 @@ Tkinter Template for Desktop Applications; Includes customized classes for scrol
 Lightweight Bitpanda UI to fetch assets (crypto, ETF, index, metal), trades, fiat wallets and transactions via Bitpanda API
 - Requires a valid [Bitpanda API Key](https://web.bitpanda.com/apikey)
 - For conversion to fiat currencies (e.g. EUR), valid [Forex Crypto Stock API key](https://fcsapi.com/document/crypto-api) as well as a [ExchangeRate API Key](https://app.exchangerate-api.com/sign-up) is required
-- Export to .json possible
+- Export to .json possible (temporary files which are deleted immediately and are only available in cache)
+- Hovering over balances, amount of transactions etc. gives extensive information as Tooltip
 
-![image](https://user-images.githubusercontent.com/75040444/134554837-976e3d1a-bac7-4306-83e4-ebd5f0e51108.png)
+![image](https://user-images.githubusercontent.com/75040444/134688788-5354dc49-a4a3-4575-a3cc-5aa36708f497.png)
 ![image](https://user-images.githubusercontent.com/75040444/134555724-a53edbb8-db9a-42ad-9bb3-4b122dc74d2b.png)