diff --git a/CHANGELOG.md b/CHANGELOG.md
index a7866cd0..9bbfcbdf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [1.4.2 / 5.59.2] - 2022-10-??
 
+### Added
+- added tooltips to resource access modes [#2300](https://github.com/sandboxie-plus/Sandboxie/issues/2300)
+
 ### Fixed
 - fixed wrong button captions in the breakout process page
 - fixed issue with saving box recovery options
diff --git a/SandboxiePlus/SandMan/Windows/OptionsAccess.cpp b/SandboxiePlus/SandMan/Windows/OptionsAccess.cpp
index c6d962df..cc930858 100644
--- a/SandboxiePlus/SandMan/Windows/OptionsAccess.cpp
+++ b/SandboxiePlus/SandMan/Windows/OptionsAccess.cpp
@@ -312,6 +312,23 @@ QString COptionsWindow::GetAccessModeStr(EAccessMode Mode)
 	return tr("Unknown");
 }
 
+QString COptionsWindow::GetAccessModeTip(EAccessMode Mode)
+{
+	switch (Mode)
+	{
+	case eNormal:		return tr("Regular sandboxie behaviore, allow read and copy on write.");
+	case eOpen:			return tr("Allow write access outside the sandbox.");
+	case eOpen4All:		return tr("Allow write access outside the sandbox, also for applciations installed inside the sandbox.");
+	case eNoRename:		return tr("Don't rename window classes.");
+	case eClosed:		return tr("Deny access to host location and prevetn creation of boxed copy.");
+	case eClosedRT:		return tr("Block access to WinRT class.");
+	case eReadOnly:		return tr("Allow read only access only.");
+	case eBoxOnly:		return tr("Hide host files, folders or registry keys from sandboxed processes.");
+	case eIgnoreUIPI:	return tr("Ignore UIPI restrictions for processes.");
+	}
+	return tr("Unknown");
+}
+
 QString COptionsWindow::GetAccessTypeStr(EAccessType Type)
 {
 	switch (Type)
@@ -616,8 +633,10 @@ void COptionsWindow::OnAccessItemDoubleClicked(QTreeWidgetItem* pItem, int Colum
 	pTree->setItemWidget(pItem, 1, pProgram);
 
 	QComboBox* pMode = new QComboBox();
-	foreach(EAccessMode Mode, GetAccessModes((EAccessType)Type))
+	foreach(EAccessMode Mode, GetAccessModes((EAccessType)Type)) {
 		pMode->addItem(GetAccessModeStr(Mode), (int)Mode);
+		pMode->setItemData(pMode->count() - 1, GetAccessModeTip(Mode), Qt::ToolTipRole);
+	}
 	pMode->setCurrentIndex(pMode->findData(pItem->data(2, Qt::UserRole)));
 	pTree->setItemWidget(pItem, 2, pMode);
 
diff --git a/SandboxiePlus/SandMan/Windows/OptionsWindow.h b/SandboxiePlus/SandMan/Windows/OptionsWindow.h
index 89e061f6..52b0822a 100644
--- a/SandboxiePlus/SandMan/Windows/OptionsWindow.h
+++ b/SandboxiePlus/SandMan/Windows/OptionsWindow.h
@@ -384,6 +384,7 @@ protected:
 	void LoadAccessListTmpl(EAccessType Type, bool bChecked, bool bUpdate = false);
 	QString	GetAccessTypeStr(EAccessType Type);
 	QString	GetAccessModeStr(EAccessMode Mode);
+	QString	GetAccessModeTip(EAccessMode Mode);
 	void ParseAndAddAccessEntry(EAccessEntry EntryType, const QString& Value, bool disabled = false, const QString& Template = QString());
 	void ParseAndAddAccessEntry(EAccessType Type, EAccessMode Mode, const QString& Value, bool disabled = false, const QString& Template = QString());
 	void AddAccessEntry(EAccessType Type, EAccessMode Mode, QString Program, const QString& Path, bool disabled = false, const QString& Template = QString());