In this step you can screen your sample for interesting sample regions (ROIs) and mark this area by a graphical element. You can define several regions of interest within in one section.

On the ROI Definition tab you can draw either a rectangle, a circle or a freehand polygon/contour. Click on the Apply button to automatically identify the region of interest in all other sections. It is also possible to Undo/Redo an action using the corresponding buttons. To remove a graphical element select it and click on the Delete (bin icon) button.

With the arrow keys on your keyboard you can jump from one ROI to the next ROI along the series to check if the structure of interest is still within the defined region of interest.