AtomicKotlinCourse/Introduction to Objects/Constraining Visibility/Exercise 4/task.md

Mastering the IDE: Extend Selection

When you apply refactorings like Extract Property, you need to select the expression that you'd like to extract, which might be quite complicated.

The Extend Selection action accessible with the &shortcut:EditorSelectWord; shortcut is very helpful here: it selects the outside expression, increasing the selection by each step. The reverse action is called Shrink selection and is accessible by &shortcut:EditorUnSelectWord;.

Try putting the caret on line println("Incorrect input: $x should be positive") and extend and shrink the selection to see how it works. Continue to extend the selection until the whole file is selected.