[docs]: add docs for .keyPress() (#1974)

# why
- docs for `page.keyPress()` were missing
# what changed

<img width="730" height="727" alt="Screenshot 2026-04-07 at 1 41 38 PM"
src="https://github.com/user-attachments/assets/1bf50de3-93b6-4fca-b632-cdb80bcfc3da"
/>


<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Added docs for `page.keyPress()` in the v3 Page reference. Includes the
method signature, supported keys and modifier combos, the `delay`
option, and examples for single keys and combinations (Enter, Cmd+A,
ArrowDown, Ctrl+C, with delay).

<sup>Written for commit 0cbf3a9.
Summary will update on new commits. <a
href="https://cubic.dev/pr/browserbase/stagehand/pull/1974">Review in
cubic</a></sup>

<!-- End of auto-generated description by cubic. -->

Author: seanmcguire12

packages/docs/v3/references/page.mdx

@@ -342,6 +342,32 @@ await page.type(text: string, options?: TypeOptions): Promise<void>
   </Expandable>
 </ParamField>
 
+### keyPress()
+
+Press a single key or key combination (keyDown then keyUp). Supports named keys, printable characters, and modifier combinations.
+
+```typescript
+await page.keyPress(key: string, options?: KeyPressOptions): Promise<void>
+```
+
+<ParamField path="key" type="string" required>
+  The key or key combination to press. Supports printable characters (`"a"`, `"1"`), named keys (`"Enter"`, `"Tab"`, `"Escape"`, `"Backspace"`, `"ArrowDown"`, etc.), and modifier combinations using `+` (`"Cmd+A"`, `"Ctrl+C"`, `"Shift+Tab"`).
+
+  Common modifier aliases like `"Cmd"`, `"Ctrl"`, `"Alt"`, and `"Option"` are accepted. `"Cmd"` maps to Meta on Mac and Control elsewhere.
+</ParamField>
+
+<ParamField path="options" type="object" optional>
+  Optional key press configuration.
+
+  <Expandable title="properties">
+    <ParamField path="delay" type="number">
+      Delay in milliseconds between the keyDown and keyUp events.
+
+      Default: `0`
+    </ParamField>
+  </Expandable>
+</ParamField>
+
 ### locator()
 
 Create a locator for querying elements.
@@ -886,6 +912,21 @@ await page.type("Hello, World!");
 // Type with delay between keystrokes
 await page.type("Slow typing", { delay: 100 });
 
+// Press a single key
+await page.keyPress("Enter");
+
+// Press a key combination (select all)
+await page.keyPress("Cmd+A");
+
+// Press with delay between keyDown and keyUp
+await page.keyPress("Escape", { delay: 100 });
+
+// Arrow key navigation
+await page.keyPress("ArrowDown");
+
+// Copy selection
+await page.keyPress("Ctrl+C");
+
 // Use locator for element interaction
 const button = page.locator("button.submit");
 await button.click();