The region annotation tool is always available by selecting the Regions toolbar button, we may then draw a rectangle anywhere in the image. This tool is useful, for example, for a quick annotation of image content by domain experts.


The current class, selected in the Classes list, defines the color and class of the region.



Each region has a unique name, which can be changed by clicking the name:



User can attach arbitrary text content to the region by clicking the left upper rectangle:



Regions with existing content are highlighted using green rectangle. When hovering over, the content is displayed in a tool-tip: