IntelliJ IDEA's GUI Designer provides several ways to create new instances of the same component on a form without returning to the Component Palette.
To add multiple instances of a component from the Palette to a form
Click the desired component in the Palette.
Keeping the Ctrl button pressed, click the target locations in the form.
Release the Ctrl button when ready.
To create a new instance of a component in a new location
To clone a component
Select the desired component on a form.