自由绘图工具可用于将单个像素或随机形状、甚至不连续的区域定义为 "感兴趣的 "区域。在绘图工具的下拉菜单中，可通过以下按钮启用自由绘图工具
下拉菜单中通过以下按钮启用了自由绘图工具：
单击该按钮后，可以在整个屏幕上绘图，直到单击绘图模式激活时下拉菜单中出现的带横线钢笔按钮退出绘图模式。
信息：
也可以使用 Escape 键退出自由手绘模式。
此外，当添加下一个 ROI 绘图工具时，绘图模式会自动退出。根据后添加的 ROI 工具应用较晚，因此占主导地位的规则，后添加的工具可以删除刚刚绘制的区域，即定义为 "不感兴趣 "区域。
下次使用自由绘图工具时，将创建一个新图层用于绘图。这些自由绘图图层不能被选中，因此也不能被删除。
信息：
如果按住鼠标右键，可以再次删除绘制的像素，但这只适用于活动的自由绘图层。
如果使用可用的绘图工具绘制的 ROI 过于杂乱，可以通过将 ROI 转移到相机来评估所得到的区域。所得到的 ROI 区域由摄像机确定、保存、返回并显示在人机界面应用程序中，在人机界面应用程序中可以通过添加或减少附加区域对其进行进一步编辑。
The freehand drawing tool can be used to define individual pixels or randomly shaped, even non-contiguous, areas as "of interest". The freehand drawing tool is enabled in the drop-down menu of the drawing tools
via the following button:
After clicking the button, it is possible to draw on the whole screen until drawing mode is exited by clicking the button with the crossed-out pen that appears in the drop-down menu when drawing mode is active.
Information:
Freehand drawing mode can also be exited with the Escape key.
In addition, drawing mode is automatically exited when the next ROI drawing tool is added. According to the rule that ROI tools added later are applied later and therefore dominant, this later-added tool can remove areas that have just been drawn, i.e. define them as "not of interest".
The next time the freehand drawing tool is used, a new layer is created for drawing. These freehand drawing layers cannot be selected and can thus not be deleted.
Information:
If the right mouse button is held down, drawn pixels can be removed again, but this only applies to the active freehand drawing layer.
If the ROI drawing becomes too cluttered with the drawing tools available, the resulting area can be evaluated by transferring the ROI to the camera. The resulting ROI area is determined by the camera, saved, returned to and displayed in the HMI application where it can be further edited by adding or subtracting additional areas.