diff --git a/main.cpp b/main.cpp
index 4857187..07d20d1 100644
--- a/main.cpp
+++ b/main.cpp
@@ -4,7 +4,15 @@
 #include "framelesshelper.h"
 
 int main(int argc, char *argv[]) {
+    // High DPI scaling is enabled by default from Qt 6
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+    // Windows: we are using the manifest file to get maximum compatibility
+    // because some APIs are not supprted on older systems such as Windows 7
+    // and 8. And once we set the DPI awareness level in the manifest file, any
+    // attemptation to try to change it through API will fail. In other words,
+    // Qt won't be able to enable or disable the DPI awareness level once we
+    // have set it in the manifest file. So the following two lines are uesless
+    // actually (However, they are still useful on other platforms).
     QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 #endif
@@ -13,6 +21,9 @@ int main(int argc, char *argv[]) {
     QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
         Qt::HighDpiScaleFactorRoundingPolicy::Round);
 #else
+    // Don't round the scale factor.
+    // This will break QWidget applications because they can't render correctly.
+    // Qt Quick applications won't have this issue.
     QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
         Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
 #endif