In order to store/get any text written on the webpage:
Select STORE command from the action drop down, select Screen name, select Element key and provide variable name in parameter section as shown below:
Here, you have to provide the locator of the UI text that goes in the element key.
UI text will get stored in a variable defined in the element key.
For example, in the above snapshot UI text will get stored in id variable which you can use in the next steps wherever required.