Floor plans are often drawn to scale to represent a real-world building or room and the actual objects within it in an accurate manner.
When you draw to scale you're agreeing that for everything in the drawing some real world dimension like a foot is equal to a smaller dimension on the printed page. For example, a common architectural scale used is 1/4" to 1'. This means each foot in the real world equals to a quarter inch on the page.
When you start a blank floor plan template in SmartDraw, it is set to this default quarter inch scale. You can easily change the scale of your drawing at any time, by going to the Page tab and clicking on Units & Scale. Picking a different scale won't break your drawing, SmartDraw will redraw everything using the new specifications.
You can also print to the original scale in the print dialog or choose a new scale only for printing.
In the Home tab, click on Print.
In the Print dialog, choose Fit to Scale in the first drop down. By default the scale selected will be the one you drew the diagram with. In this case 1/4" scale. Choosing the scale will automatically set the paper size needed to print your diagram at the scale. If you need to fit your drawing onto a different paper size, you can select a new scale. Changing the scale in the print dialog will not change the scale for your drawing. This is just for the purposes of printing.
Learn more about printing to scale.