Can't change “Welcome message”, Logo, copyright

Question

I am using Magento ver. 2.3.5-p1 and I have trouble changing the "Wellcome message", the logo, and the copyright. I have managed to change them once by going on the admin page, then Content->Design->Configuration->Edit. In Header, if I try to change the logo image or the size or the Welcome message, the changes will not appear on the store website. I also try to change the copyright in Footer with the same result. Things I've tried:

• Save Configuration -> Flush Magento cache - in Admin panel
• Save Configuration -> Flush cache storage -> Flush Catalog Images cache -> Flush JavaScript/CSS cache -> Flush Static Files cache - in Admin panel
• magento setup:upgrade -> magento setup:di:compile - in terminal

The messages (Wellcome message and the copyright) and the logo are not changing. Why?

Answer 1

I have a better answer: I selected Stores-Settings-Configuration-General-General then in the bottom of the page there is a setting called "Enable Single-Store Mode". After changing that to "No" I could make my changes.

Answer 2

In the end, I've managed to make the changes by updating the database. I've looked for design/header/welcome and change the value to the message I want. Did the same for design/footer/copyright and for design/header/logo_src.

After that, in terminal:

./magento setup:upgrade

./magento setup:di:compile

Perhaps is not the best way but works for now.