I was trying to make my cursor more visible. I do use a dark theme and reading glasses. For that gnome uses a black, small mouse pointer by default, with a white line surrounded. This on dark background is quite difficult to see.
There are several places to configure the mouse, and of course this is the first place I looked after.
Before making the changes it is need to install the gnome-tweaks extension.
Then installing sudo dnf install bluecurve-cursor-theme gives the theme for the cursor which is, changing from black (desktop) to white (content).
After installing the Cursor Theme it is possible to:
Change the Cursor theme (gnome-tweaks, Appearance, Styles, Cursor)
On a new installation there is no selection possible because it has just one cursor theme installed.