I don't think this is possible unless you first take a screenshot of the table viewer and then add a text box to your dashboard and use the screenshot images as background of the text box. You can then use a button to show/hide that text box.
1. Create a variable vShow and give it an initial value -1
2. Add a Set Variable action to the button the set variable vShow to the value =Not vShow.
3. Change Show option of the Text box to Conditional and use =vShow as conditional expression.
