diff --git a/js/methods.js b/js/methods.js
index f82c2cc..e5db0ff 100644
--- a/js/methods.js
+++ b/js/methods.js
@@ -504,6 +504,9 @@ function toggleHpet(value) {
   });
 }
 
+/**
+ * Any element containing class "windows-only" will be hidden on other platform.
+ */
 function handlePlatformSpecificDisplay() {
   var windows_only_elements = document.getElementsByClassName('windows-only');
   if (require('os').platform() !== 'win32') {
diff --git a/js/preset.js b/js/preset.js
index e3e0692..10d7c83 100644
--- a/js/preset.js
+++ b/js/preset.js
@@ -1,3 +1,6 @@
+/**
+ * Will fill the export preset modal textarea with the preset data.
+ */
 function preset_export() {
   const modalTextArea = document.getElementById('modal-export-preset-textarea');
   const settings = require('electron-settings');
@@ -7,6 +10,9 @@ function preset_export() {
   modalTextArea.innerHTML = btoa(presets);
 }
 
+/**
+ * Will import the preset from the export preset modal textarea.
+ */
 function preset_import() {
   const modalTextArea = document.getElementById('modal-import-preset-textarea');
   const settings = require('electron-settings');