ROI creation

roi_selection

To create a ROI on the image, you can choose between two modes:

roi_selection_pen The pen mode allows you to add one or multiple ROI.
roi_selection_scissors The scissors mode allows you to cut (remove) into a full shape while retaining the surrounding selected area.

Then, use the shape tools to draw desired shapes:

draw_line Draw a straight line.
draw_curve Draw a freehand line.
draw_rectangle Draw the edge of a rectangle.
draw_full_rectangle Draw a filled rectangle.
draw_circle Draw the edge of a circle.
draw_full_circle Draw a filled circle.
draw_free_form Draw a free form edge.
draw_full_free_form Draw a filled free form.