diff --git a/.gitignore b/.gitignore
index e7b7242..99ea931 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,5 +7,6 @@ node_modules
 package-lock.json
 
 # build
+data.json
 main.js
-*.js.map
\ No newline at end of file
+*.js.map
diff --git a/main.ts b/main.ts
index 1b8b349..eed0b88 100644
--- a/main.ts
+++ b/main.ts
@@ -1,25 +1,26 @@
-import { loadMathJax, Plugin } from 'obsidian';
+import { loadMathJax, App, Plugin, PluginManifest, PluginSettingTab, Setting } from 'obsidian';
 
-const DEFAULT_PREAMBLE_PATH = "preamble.sty";
+interface PluginSettings {
+  preamblePath: string;
+}
+
+const DEFAULT_SETTINGS: PluginSettings = {
+  preamblePath: "preamble.sty",
+};
 
 export default class JaxPlugin extends Plugin {
-  async read_preamble () {
-    return await this.app.vault.adapter.read(DEFAULT_PREAMBLE_PATH);
+  app: App;
+  settings: PluginSettings;
+
+  constructor(app: App, manifest: PluginManifest) {
+    super(app, manifest);
+    this.app = app;
+    this.settings = DEFAULT_SETTINGS;
   }
 
-	async onload() {
-    // Load MathJax so that we can modify it
-    // Otherwise, it would not be loaded when this plugin is loaded
-    await loadMathJax();
+  async loadPreamble() {
+    const preamble = await this.app.vault.adapter.read(this.settings.preamblePath);
 
-    if (!MathJax) {
-      console.warn("MathJax was not defined despite loading it.");
-      return;
-    }
-
-    // Read the preamble out from the file
-    let preamble = await this.read_preamble();
-    
     if (MathJax.tex2chtml == undefined) {
       MathJax.startup.ready = () => {
         MathJax.startup.defaultReady();
@@ -28,12 +29,61 @@ export default class JaxPlugin extends Plugin {
     } else {
       MathJax.tex2chtml(preamble);
     }
+  }
+
+  async loadSettings() {
+    this.settings = Object.assign({}, DEFAULT_SETTINGS, await this.loadData());
+  }
 
+  async saveSettings() {
+    await this.saveData(this.settings);
+  }
+
+  async onload() {
+    await this.loadSettings();
+    this.addSettingTab(new JaxPluginSettingTab(this.app, this));
+
+    // Load MathJax so that we can modify it
+    // Otherwise, it would not be loaded when this plugin is loaded
+    await loadMathJax();
+
+    if (!MathJax) {
+      console.warn("MathJax was not defined despite loading it.");
+      return;
+    }
+
+    await this.loadPreamble();
     // TODO: Refresh view?
-	}
+  }
 
-	onunload() {
+  onunload() {
     // TODO: Is it possible to remove our definitions?
-		console.log('Unloading Extended MathJax');
-	}
-}
\ No newline at end of file
+    console.log('Unloading Extended MathJax');
+  }
+}
+
+class JaxPluginSettingTab extends PluginSettingTab {
+  plugin: JaxPlugin;
+
+  constructor(app: App, plugin: JaxPlugin) {
+    super(app, plugin);
+    this.plugin = plugin;
+  }
+
+  display(): void {
+    const { containerEl } = this;
+    containerEl.empty();
+
+    new Setting(containerEl)
+      .setName('Preamble path')
+      .setDesc('Path to global preamble. (Requires reload!)')
+      .addText((text) =>
+	text
+	  .setValue(this.plugin.settings.preamblePath)
+	  .onChange(async (value) => {
+            this.plugin.settings.preamblePath = value;
+            await this.plugin.saveSettings();
+          })
+      );
+  }
+}