I would like to start off saying I have 0 tech knowledge and this staying at home period has forced me to learn alot!
So recently I bought a new 4k monitor to upgrade my work at home experience. Previously, an employee at a store helped my set up my Macbook Air (13inch 2017) to an external display monitor via a cable that one end connects to thunderbolt and the other to DP. Everything worked good.
Then I bought this new monitor that has more options such as blue screen filter, change contrast etc etc (https://www.bhphotovideo.com/lit_files/152620.pdf). Following what I had done before I connected the two but discovered I am missing the full display option to change this blue light filter and others. Google didn't give me an answer so I called the tech department of the store and they said this (https://www.bestbuy.ca/en-ca/product/insignia-insignia-mini-displayport-to-hdmi-adapter-ns-pd94592-c-ns-pd94592-c/10294299) is the magic solution to everything?
Is this true? I know next to nothing about DP and HDMI and my question is as I only have 1 thunderbold if I buy this adapter does it mean there is no need then for my current thunderbolt to DP cable?
If what the store employee said is true would someone be so kind to link/explain why this would solve my problem, and if not what is the solution to my problem.
Thank you and have a great day :)