While viewing imagery in your account, you can use the polygon tool to select, measure, and save areas of your field. To do so, find the polygon tool in the upper right corner of your screen and click.
After you click on the polygon tool, use your cursor to select part of your field by clicking at different points to outline it. You will see your selected area highlighted in blue. Once you’ve outlined the area, click inside the box of your first selection point and a box will pop up at the bottom of your screen.
Here you will see the size of your field as well as buttons to download your selected shape as a GEOJSON file or a Shapefile. You can also use the Select Use Case drop down menu to mark the selected area as a particular issue. You can also label the selection in the Label Title area or make a comment in the Comments section.
To delete your selected area, click the Clear button to the right of the polygon tool button at the top of your screen, or the trashcan icon at the bottom of the selection information box.