diff --git a/ui/widgets/separate_panel.cpp b/ui/widgets/separate_panel.cpp
index 10abfe7d..f8d00333 100644
--- a/ui/widgets/separate_panel.cpp
+++ b/ui/widgets/separate_panel.cpp
@@ -788,13 +788,13 @@ void SeparatePanel::focusInEvent(QFocusEvent *e) {
 	});
 }
 
-void SeparatePanel::setInnerSize(QSize size) {
+void SeparatePanel::setInnerSize(QSize size, bool fixed) {
 	Expects(!size.isEmpty());
 
 	if (rect().isEmpty()) {
-		initGeometry(size);
+		initGeometry(size, fixed);
 	} else {
-		updateGeometry(size);
+		updateGeometry(size, fixed);
 	}
 }
 
@@ -802,7 +802,7 @@ QRect SeparatePanel::innerGeometry() const {
 	return _body->geometry();
 }
 
-void SeparatePanel::initGeometry(QSize size) {
+void SeparatePanel::initGeometry(QSize size, bool fixed) {
 	const auto active = QApplication::activeWindow();
 	const auto available = !active
 		? QGuiApplication::primaryScreen()->availableGeometry()
@@ -847,14 +847,24 @@ void SeparatePanel::initGeometry(QSize size) {
 		return initRect.translated(center - initRect.center()).marginsAdded(_padding);
 	}();
 	move(rect.topLeft());
-	setFixedSize(rect.size());
+	if (fixed) {
+		setFixedSize(rect.size());
+	} else {
+		resize(rect.size());
+	}
 	updateControlsGeometry();
 }
 
-void SeparatePanel::updateGeometry(QSize size) {
-	setFixedSize(
-		_padding.left() + size.width() + _padding.right(),
-		_padding.top() + size.height() + _padding.bottom());
+void SeparatePanel::updateGeometry(QSize size, bool fixed) {
+	if (fixed) {
+		setFixedSize(
+			_padding.left() + size.width() + _padding.right(),
+			_padding.top() + size.height() + _padding.bottom());
+	} else {
+		resize(
+			_padding.left() + size.width() + _padding.right(),
+			_padding.top() + size.height() + _padding.bottom());
+	}
 	updateControlsGeometry();
 	update();
 }
diff --git a/ui/widgets/separate_panel.h b/ui/widgets/separate_panel.h
index 5cca3f4c..e6931035 100644
--- a/ui/widgets/separate_panel.h
+++ b/ui/widgets/separate_panel.h
@@ -58,7 +58,7 @@ class SeparatePanel final : public RpWidget {
 
 	void setTitle(rpl::producer<QString> title);
 	void setTitleHeight(int height);
-	void setInnerSize(QSize size);
+	void setInnerSize(QSize size, bool fixed = true);
 	[[nodiscard]] QRect innerGeometry() const;
 
 	void setHideOnDeactivate(bool hideOnDeactivate);
@@ -118,8 +118,8 @@ class SeparatePanel final : public RpWidget {
 private:
 	void initControls();
 	void initLayout(const SeparatePanelArgs &args);
-	void initGeometry(QSize size);
-	void updateGeometry(QSize size);
+	void initGeometry(QSize size, bool fixed = true);
+	void updateGeometry(QSize size, bool fixed = true);
 	void showControls();
 	void updateControlsGeometry();
 	void validateBorderImage();