How to change the appearance of the site on your computer?

Question

Google Chrome

Please tell me how can I move the buttons on someone else's site to a place convenient for me so that the changes are only on my local machine.
I'll give you an example. There is a trading site, it has two buttons that I constantly press, one is at the very top, the second is at the very bottom. In order to press them, I need to either turn the wheel to the very top or to the very bottom.
I know that there is a way to independently swap any blocks on the site. This is done somehow locally with the help of user scripts, but there is a lot of information, eyes run wide from it, and where to dig is not entirely clear.
Help narrow the search.
Thank you very much in advance

Answer 1

stylish - change the CSS of the site (your styles will overwrite the author's ones).
Select an element with a CSS selector and add it

position: fixed;// фиксирован
top: 0;// отступ сверху
right: 0;// отступ справа

You may need to add !important;

position: fixed !important;
//...

Answer 2

1. Install this chrome extension. (similar to Greasemonkey)
2. Create a script only for this (you need) site (there is a filter: on which domains the script will be active)
3. Find the desired object and write in js in the created script: what needs to be done with it.
Profit!