Arcballcamera changed to camerapreviewport

I’m learning this video material now “Intro to TouchDesigner for Pixel Mapping - Ben Voigt and Markus Heckmann” and everything is fine, but there is outdated information.
In the video, the teacher uses the “arcballcamera” tool to preview the work with the LED strip, but in the TD itself, this tool was replaced with “cameraviewport”.
Sorry for the stupid question, but could you please tell me how I can use this tool for this task? (creating a preview)
Simulating an LED strip using SOP “Line”

Thank you !