Hi @pilar
The one way to do this in to play with the settings in the Layout. Instead of using roll paper, use the smallest sheet of paper that your largest pattern piece will fit on. This will place your pattern on as many sheets as is necessary.
Another way is to choose the pattern pieces that you want on one sheet, you may then use the roll paper, create your Inkscape page and then go back and choose the 2nd sheet pattern pieces. You choose the pattern pieces by ‘turning them on or off’ in Detail mode. See the image below:
I hope this helps you 