In an Org mode buffer:

- Toggle the mode with {M-x org-pretty-tags-mode RET}.
- Activate the mode with {C-u M-x org-pretty-tags-mode RET}.
- Deactivate the mode with {C-u -1 M-x org-pretty-tags-mode RET}.

- Toggle the global-mode with {M-x org-pretty-tags-global-mode RET}.
- Activate the global-mode in every buffer with {C-u M-x
  org-pretty-tags-global-mode RET}.
- Deactivate the global-mode in every buffer with {C-u -1 M-x
  org-pretty-tags-global-mode RET}.

Refresh agenda buffers (key =g= or =r=) to follow the latest setting
of pretty tags in the buffers.

- Turn the mode on by default by configuring in {M-x
  customize-variable RET org-pretty-tags-global-mode RET}.

Use {M-x customize-variable RET org-pretty-tags-surrogate-strings RET} to
define surrogate strings for tags.  E.g. add the pair "money", "$$$".

If you don't like the predefined surrogates then just delete them.

Use {M-x customize-variable RET org-pretty-tags-surrogate-images RET} to
define surrogate images for tags.  The definition of the image is
expected to be a path to an image.  E.g. add the pair "org", "<path to
org icon>".

See also the literate source file.  E.g. see https://gitlab.com/marcowahl/org-pretty-tags.