It’s on purpose that I didn’t put the topic in “solved”, because I thought that if I had other problems for the continuation, I could add them, then finally I will put the topic in “solved” when all is well.
Here for example, I have a problem in the creation of a css file to modify the font, here is :
I created a “css” folder in /user/themes/mytheme, then I created a “custom. css” in /mytheme, and I wrote a test of font modification inside, see screenshot, then, I opened the site, and reloaded the page with “ctrl+shift+r”, to see the change, but it did not work, the font remains the same, I specify that the active theme is well “mytheme”, on the other hand I modified the rights for “custom.css” (-rwxrwx—), do you have a suggestion? Thank you in advance.jef