diff --git a/src/elements/flex.rs b/src/elements/flex.rs
index 5eae14c..516007e 100644
--- a/src/elements/flex.rs
+++ b/src/elements/flex.rs
@@ -20,7 +20,7 @@ pub struct FlexCol {
 impl Element for FlexRow {
     fn render(&mut self, scope: &mut crate::render_scope::RenderScope) {
         let (width, height) = scope.get_size_or(self.size.0, self.size.1);
-        scope.draw_rect(width, height, 0);
+        scope.use_area(width, height);
     }
 
     fn after_render(&mut self, scope: &mut crate::render_scope::RenderScope) {
@@ -86,7 +86,7 @@ impl FlexRow {
 impl Element for FlexCol {
     fn render(&mut self, scope: &mut crate::render_scope::RenderScope) {
         let (width, height) = scope.get_size_or(self.size.0, self.size.1);
-        scope.draw_rect(width, height, 0);
+        scope.use_area(width, height);
     }
 
     fn after_render(&mut self, scope: &mut crate::render_scope::RenderScope) {
diff --git a/src/render_scope.rs b/src/render_scope.rs
index 9f765a3..85cf3eb 100644
--- a/src/render_scope.rs
+++ b/src/render_scope.rs
@@ -65,6 +65,11 @@ impl RenderScope {
         self.transform.height = self.transform.height.max(height);
     }
 
+    pub fn use_area(&mut self, width: u16, height: u16) {
+        self.transform.width = self.transform.width.max(width);
+        self.transform.height = self.transform.height.max(height);
+    }
+
     pub fn draw(&self) {
         let width = self.transform.width;
         let height = self.transform.height;