When Camtasia developers need to add attention-grabbing visual affects to a software demonstration created using the Camtasia Recorder, the work is typically accomplished by editing the recording in Camtasia Studio. However, using Camtasia's Effects Toolbar, you can add several attention-grabbing visuals while you are recording your video.
Start the Camtasia Recorder. Enable the Effects toolbar by choosing Tools > Recording toolbars and selecting Effects (click the OK button to close the Recording toolbars dialog box).
After the 3-2-1 countdown, the Effects tools appear on the Recording toolbar.
Select the ScreenDraw tool to display different Drawing tools. You can select from among frames, lines, highlights, ellipses and even a pen.
At this point, you can use the tools to draw all kinds of shapes on the screen (at the same time that you're creating the video).