Hi Yana
Thanks toprodek. great way to do it.
Another option would be to go to the area you would like to extend on your track in the mixing screen. Hold down the shift key on your keyboard and while holding down the left button on your mouse, make a selection. A grey selection box will appear. Click play to hear the selection and make sure it loops correctly. Click on the loop play button to make sure. Only audio in this selection box will play until you click outside it.
Once you are happy with the selection, right click on the selection box and select cut. That area will now be cut out of the track and the track will now be 2 separate segments. Then go to area underneath the first track and select paste. A new track will appear with the selection/loop underneath. Drag the loop out to your desired length and then match up the new loop area to the end of the first segment and the beginning of the second segment.
I hope this makes sense to you or you need any more help, give me a shout and I will make a video for you tomorrow.
Best regards
Cormac