First Draft.

Setting-Environmental-Variables.md

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+
+How you set variables will depend on how sway was started. 
+The explanation below was based on these [sources][webref1]
+
+Environment variables are inherited from the process that starts sway. You need to set variables there.
+
+**Some of the possible options are:** 
+- login manager: check the documentation.
+- login shell: export them there before launching sway.
+- user service: use the EnvironmentFile= key and an environment file.
+
+## Login Manager
+
+### PAM
+Set environment variables specific to user session in the `$HOME/.pam_environment`. That gets them set right on log in and would work for most methods of launching sway.
+Note: these variables will be set in non-sway sessions too.
+ 
+For more info: ```man 8 pam_env```
+
+### Set the Sway Config
+Technically, you could set them in your sway config.
+
+## Login Shell
+If you launch sway from my login shell, your ~/.zprofile or ~/.profile should work.
+
+## User Service
+You can set variables using the environment.d. Environment variables set there will be read by the --user systemd, and since everything is started in its hierarchy variables will properly propagate.
+This will not work with some login managers.
+
+For more info: ```man environment.d```
+
+[webref1]: https://www.reddit.com/r/swaywm/comments/eewutx/how_to_set_environment_variables_before_starting/