Newbie question re land size

[Magpiegirl]

Hiya, i have used this program a few years ago to design our house, trying to build an extension on another house now, but the floor plan size is too small, 13 x 20m but its a sprawling old farm house, how to i increase the size of the grid please? i tried to add a room as i searched and searched and found a post that said it will just snap to size, butits not working, i try to add another room but it just stops at the edge, best wishes and thankyou in advance, cheers, jo

[Puybaret]

Just zoom out or drag an item on the border of the plan. It will enlarge automatically.