Changing the settings with the application, "lightdm GTK+ interface configuration" from the control center I have no success, since changing the theme icons, font type, size, touching other available settings such as: panel, changing the position of the login on the screen, among others, nothing has helped me.
After I reboot the system everything remains the same as the first time I installed the system, with the green background and matte logo. I have actively reviewed the forum to see if anyone else has happened the same as me and I have not found information, however if anyone has seen the lightdm guide or problems regarding this issue I would appreciate it if you could refer me to that answer.
I may have to edit a file or two to change the look and feel of the default interface. I have tested on ubuntu mate 22.04 from a virtual machine and from my ubuntu mate 21.10 but without achieving the slightest change. From Debian 11 with mate desktop environment I did manage to change these settings with lightdm's gtk+ interface tool. I don't know what I'm doing wrong in the process.
thanks for the help.