Folder Structure

To annotate a single folder of images, simply select the folder containing the png images and start annotating.
To load multiple folders of images, the images should be located on your hard disk in the following folder structure:

<Any Folder Name>

|-----<Any Folder Name>

|-----<some other folders>

In this case, you can select a folder that contains one or more folders of png images and then use the folder drop-down menu at the top to select the correct folder you want to annotate.