Cursor Style

To manage cursor style, it would be best to install gnome-tweaks tool to manage its style.

Note that files (of type X11 cursor) inside cursor style can be viewed with gimp.

The place to place cursor styles is inside /usr/share/icons/.

Constructing Cursor Style

Just download any cursor style online, example: https://www.gnome-look.org/browse?cat=107&ord=latest

Then change any file there for your cursor style, like if you downloaded oero_blue_cursors, you can replace default, progress, text, pointer, help, alias, up-arrow and many others.

To deploy it, just use gnome-tweaks tools, in appearance tab, change the Cursor under Themes to your cursor style.

For trying to create one's own X11 cursor files, remember I have written a library before for cur2png and png2cur by C. (Oops, does the C lib or the python lib work? Forgotten)

Please see the ./lib/cursor_style_lib, the library's underlying logic is that I already get a window cursor style zip, so I want to adapt it to a ubuntu style.