Detail option disabling in README

Make it more clear/explicit in the README exactly how to disable the default options

README.md

@@ -275,7 +275,7 @@ You can also customize the hud by using the `MANGOHUD_CONFIG` environment variab
 You can also specify configuration file with `MANGOHUD_CONFIGFILE=/path/to/config` for applications whose names are hard to guess (java, python etc).
 
 A partial list of parameters are below. See the config file for a complete list.
-Parameters that are enabled by default have to be explicitly disabled. These (currently) are `fps`, `frame_timing`, `cpu_stats` (cpu load), `gpu_stats` (gpu load).
+Parameters that are enabled by default have to be explicitly disabled. These (currently) are `fps`, `frame_timing`, `cpu_stats` (cpu load), `gpu_stats` (gpu load), and each can be disabled by setting the corresponding variable to 0 (e.g., fps=0).
 
 | Variable                           | Description                                                                           |
 |------------------------------------|---------------------------------------------------------------------------------------|