Gregg,

   You might want to take a look at the tutorial video on adding boundaries located at http://mylandplan.org/video/how-add-property. This video will show you how you can delete a boundary. Essentially you just click the boundary you want to delete, and click the "delete boundary" button on the popup menu. You cannot actually calculate the acreage of anything on the boundaries map without drawing a boundary since the acreage calculation is tied to the drawing of the boundaries. You can temporarily draw one and remove it if you just are curious what the acreage is. Keep in mind that the acrage is an approximation using a formula so it won't be exact.