added most of the functionality for choosing font

module/deltagreen.js

@@ -4,7 +4,7 @@ import { DeltaGreenActorSheet } from "./actor/actor-sheet.js";
 import { DeltaGreenItem } from "./item/item.js";
 import { DeltaGreenItemSheet } from "./item/item-sheet.js";
 import { sendPercentileTestToChat, sendLethalityTestToChat, sendDamageRollToChat } from "./roll/roll.js";
-
+import { registerSystemSettings } from "./settings.js"
 import { preloadHandlebarsTemplates } from "./templates.js";
 
 Hooks.once('init', async function() {
@@ -26,6 +26,9 @@ Hooks.once('init', async function() {
     decimals: 0
   };
 
+  // Register System Settings
+  registerSystemSettings();
+
   // Define custom Entity classes
   CONFIG.Actor.entityClass = DeltaGreenActor;
   CONFIG.Item.entityClass = DeltaGreenItem;
@@ -106,6 +109,29 @@ Hooks.once('init', async function() {
       return "";
     }
   });
+
+  // looks at system setting for what font to use and returns the class that is then used in the handlebars template that 
+  // generates the character sheet.
+  Handlebars.registerHelper('getFontFamilySystemSettingClass', function() {
+    let setting = game.settings.get("deltagreen", "characterSheetFont");
+    
+    if(setting === "TypeWriterCondensed"){
+      return "typewriter-condensed-font";
+    }
+    else if(setting === "Martel"){
+      return "martel-font";
+    }
+    else if(setting === "Signika"){
+      return "signika-font";
+    }
+    else if(setting === "atwriter"){
+      return "atwriter-font";
+    }
+    else{
+      return "martel-font";
+    }
+    
+  });
 });
 
 Hooks.once("ready", async function() {

module/settings.js

@@ -0,0 +1,19 @@
+export const registerSystemSettings = function() {
+    game.settings.register('deltagreen', 'characterSheetFont', {
+        name: "World Font Choice",
+        hint: "Choose font style for use throughout this world.",
+        scope: "world",     // This specifies a world-stored setting
+        config: true,        // This specifies that the setting appears in the configuration view
+        type: String,
+        choices: {           // If choices are defined, the resulting setting will be a select menu
+          "TypeWriterCondensed": "Condensed Typewriter",
+          "atwriter": "Another Typewriter",
+          "Martel": "Martel",
+          "Signika": "Signika"
+        },
+        default: "TypeWriterCondensed",        // The default value for the setting
+        onChange: value => { // A callback function which triggers when the setting is changed
+          console.log(value)
+        }
+    });
+}