You can show the selected values for a parameter through dashboard title or a text box.
To show text though dashboard title, you can refer this,
To show using text box,
1.Click on floating and select the text box from objects on the right side of the screen.
2. Now write your text as required and then click on the insert button in the window.
3. You can format the text, change color, size and click ok.
I have added 2 text box to show format.
Hope this helps you.