diff --git a/src/lib.rs b/src/lib.rs
index 9a25353..bbfc4d8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1206,6 +1206,23 @@ impl<'ui> Ui<'ui> {
             unsafe { sys::igEndPopup() };
         }
     }
+    /// Create a modal pop-up.
+    ///
+    /// # Example
+    /// ```rust,no_run
+    /// # use imgui::*;
+    /// # let mut imgui = ImGui::init();
+    /// # let ui = imgui.frame(FrameSize::new(100.0, 100.0, 1.0), 0.1);
+    /// if ui.button(im_str!("Show modal"), (0.0, 0.0)) {
+    ///     ui.open_popup(im_str!("modal"));
+    /// }
+    /// ui.popup_modal(im_str!("modal")).build(|| {
+    ///     ui.text("Content of my modal");
+    ///     if ui.button(im_str!("OK"), (0.0, 0.0)) {
+    ///         ui.close_current_popup();
+    ///     }
+    /// });
+    /// ```
     pub fn popup_modal<'p>(&self, str_id: &'p ImStr) -> PopupModal<'ui, 'p> {
         PopupModal::new(self, str_id)
     }
diff --git a/src/popup_modal.rs b/src/popup_modal.rs
index 791a644..0f2e873 100644
--- a/src/popup_modal.rs
+++ b/src/popup_modal.rs
@@ -5,6 +5,7 @@ use super::{ImGuiWindowFlags, ImStr, Ui};
 
 use sys;
 
+/// Created by call to [`Ui::popup_modal`].
 #[must_use]
 pub struct PopupModal<'ui, 'p> {
     label: &'p ImStr,
@@ -22,6 +23,8 @@ impl<'ui, 'p> PopupModal<'ui, 'p> {
             _phantom: PhantomData,
         }
     }
+    /// Pass a mutable boolean which will be updated to refer to the current
+    /// "open" state of the modal.
     pub fn opened(mut self, opened: &'p mut bool) -> Self {
         self.opened = Some(opened);
         self
@@ -98,6 +101,7 @@ impl<'ui, 'p> PopupModal<'ui, 'p> {
             .set(ImGuiWindowFlags::AlwaysUseWindowPadding, value);
         self
     }
+    /// Consume and draw the PopupModal.
     pub fn build<F: FnOnce()>(self, f: F) {
         let render = unsafe {
             sys::igBeginPopupModal(