Properly configuring an external monitor via HDMI (disable HDMI overscan)

My primary monitor is having some bad times, so I needed to connect my old good backup monitor. Tried both ports, but picture looked cropped, colors were crazy and I was almost mad. Tried some OS software, but result was pretty crappy.

Then, eventually, after reading one of the guides from software found that HDMI overscan needs to be disabled. Some newer models might automatically detect what is conencted, and set proper mode, disabling HDMI overscan, but as I told, my backup device is pretty old. Checked its settings and did not find anything. Then finally googled a solution - I needed to rename source name in TV settings! Menu => Source List => Edit name. Renamed it to "DVI PC" (chosen from list of predefined names), and finally - picture became nice and properly sized :)

References:

• https://support.displaylink.com/knowledgebase/articles/611877
• https://www.engadget.com/2010/05/27/hd-101-overscan-and-why-all-tvs-do-it/
• http://www.storageforum.net/forum/showthread.php/8905-How-to-Disable-overscan-on-a-Samsung-quot-SMART-quot-tv-solved