From the Image Detail page you can annotate images to highlight areas with arrows, lines, text boxes and scale markers. 

To access the Image Detail page click on the image preview in the bottom right of the map when viewing a dataset. 

TerrainDrop dataset image selected sandiego annotation

 

This will show the Image Detail page which shows a higher resolution version of the image on the map, various controls on the right and all of the overlapping images in the bottom. 

TerrainDrop image detail annotation

 

Click on the 'Annotate' tab to show the image. 

TerrainDrop image detail control tabs annotation

 

Click on the image to open up the annotation tools.

TerrainDrop annotation markup enabled tab

 

Add annotations as needed. 

TerrainDrop add annotations image detail

The X button cancels out without saving the modifications. The checkmark saves the modifications and gives you an option to transfer the annotations to the map. This image shows the result of the annotations being transferred to the map. 

TerrainDrop save transfer annotations to map

 

If the map annotations need to be modified you can click the edit button and make any necessary changes. Hit 'Save' when you are done.

TerrainDrop edit map annotations

 

Notice how the annotations on the image and the map line up nicely.

TerrainDrop annotations markup saved

 

The annotations that are transferred to the map now show in the Dataset Detail as well. 

TerrainDrop annotation markup shows in dataset detail