Powerclip is a popular feature that allows you contain one object inside another. Once you have a PowerClip on the page, pressing the <CTRL> key and clicking on the object will enter edit mode. Once in edit mode, if you hold the <CTRL> key and click on the desktop area you will exit editing mode and return to your entire document. Tip provided by Tony Severenuk , CorelDRAW Product Development team
Powerclip is powerfull tools, the creativity is limitless... no need of masking anymore... :)
@silvio : actually its Ctrl + Click