To edit or delete a geometry, it needs to be highlighted first with the Edit arrow. This can be done either of two ways-by single clicking on the geometry or by clicking Edit and choosing Single, and then click on the geometry to highlight it. You can grab any of the green points to make adjustments. To delete, click the Trashcan icon (or press delete on the keyboard). When you finish making your changes, select Finish Measuring.
TIP: You can select multiple geometries, by using Multi-select and drawing a rectangle around the geometries or you can multi-select specific geometries by holding down the Shift key and clicking on the geometries.