The menu ROI allows you to generate the model region of interest by drawing and modifying it on the displayed model image.
To draw objects, click into the image and move the mouse over the object while keeping the left mouse button pressed; the selected shape appears. After releasing the mouse button you can move the ROI by dragging its center (marked with a cross) with the left mouse button. Furthermore, you can edit the shape by dragging its boundaries. Finish the creation by clicking once with the right mouse button.
| Menu Entry | Description |
| Draw Circle | Interactively create a circle, see gen_circle for its parameters. |
| Draw Ellipse | Interactively create an ellipse, see gen_ellipse for its parameters. |
| Draw Axis-aligned Rectangle | Interactively create an axis-aligned rectangle, see gen_rectangle1 for its parameters. |
| Draw Rotated Rectangle | Interactively create an oriented rectangle, see gen_rectangle2 for its parameters. |
| Draw Arbitrary Region | Create polygons and free-form shapes:
Note that in both cases you can neither edit the ROI form nor the orientation after its creation! |
| Delete Selected ROI Item | Delete a selected model ROI. |
| Delete All ROIs | Delete all model ROIs. |
| Union | The ROI to be added and the existing total ROI form the new total model ROI by taking the union of the ROIs. Note: The behavior stays for this ROI also when modifying the model ROIs later. |
| Intersection | The ROI to be added and the existing total ROI form the new total model ROI by taking the intersection of the ROIs. Note: The behavior stays for this ROI also when modifying the model ROIs later. |
| Difference | The ROI to be added and the existing total ROI form the new total model ROI
by taking the difference to the existing total ROI. Note: The behavior stays for this ROI also when modifying the model ROIs later. |
| XOR (symmetrical difference) | The ROI to be added and the existing total ROI form the new total model ROI
by taking the difference of the ROIs. Note: The behavior stays for this ROI also when modifying the model ROIs later. |
| Load ROI from File | Load an ROI as model ROI. |
| Save ROI to File | Save the current model ROI. |