If a bathroom design is (too) large, it may not fully fit on one page when you export it as a pdf.
Should this be the case, you can adjust the scale of the drawing. By default, this is set to 1:20.
In the ‘dimensions’ step, the scale is shown in the menu on the left. When you adjust it, you will see the white square in your design become larger or smaller. This square indicates what fits on one pdf page. For example, change the scale to 1:40 to ‘zoom out’ the dimension drawing so that it does fit on one page.