Update settings.md

Some fixes and better writing.

Author: nep

docs/add-ons/pro-variables/settings.md

@@ -13,19 +13,21 @@
 
 ### Select Variable Managers
 
-Select the member groups that are allowed to manage the variables, rather than just editing their contents.
+Select the member groups that are allowed to manage the variables (create, modify settings, delete), rather than just editing their contents. Overall access to Pro Variables is controled in the Member Role settings under "Allowed add-on access," but by default only Super Admins can manage variables -- all other member roles will only have access to edit the variables.
 
 ### Clear cache
 
-If set to Yes, all native cache will be cleared after variables are saved. If set to Ask, a checkbox will appear next to the Save Changes button to optionally clear the cache. It will be unchecked by default with opt-in, checked by default with opt-out.
+If set to No, changing a Pro Variable will never clear the cache. If set to Yes, all native cache will be cleared whenever any variables are saved. If set to "Optionally", you will see two buttons: "Save Variables" and "Save and Clear Cache" to optionally clear the cache.
 
 ### Enable early parsing?
 
-Choose if variables can be parsed early in the parsing order; before or after existing Snippets and config-variables. Yes, before Snippets will parse early parsed Pro Variables before Snippets and variables set in config.php; Yes, after Snippets will parse them after. 
+This controls the overall ability for Pro Variables to be parsed early in the parsing order. By default, which is "No," all Pro Variables will be parsed quite late in the parsing order (i.e. when Global Variables are parsed). If set to Yes at all, then you can control the parsing timing of each individual Pro Variable. If set to "Yes, before Snippets," early parsing will happen just before existing Template Partials and config variables are parsed, which means they can include Partials. If set to "Yes, after Snippets," that means EE will parse (chosen) Pro Variables just after Template Partials and variables set in config.php, so you can include Pro Variables in those places.
+
+NOTE: You also need to turn on early parsing for each individual variable you want to exhibit this behavior.
 
 WARN: Use caution when turning on this feature, as users could potentially break your templates!
 
 
 ### Variable types
 
-Here you can find a list of available Variable Types and Pro Variables compatible Field Types. Select which types you want to enable. Disabled types will not appear in the module.
+Here you can find a list of available Variable Types — Pro Variables-compatible Field Types. Select which types you want to enable. Disabled types will not be made available in the module.