add documentation of printToScreen()

Author: lee2sman

docs/reference/assets/printToScreen1.webp

@@ -135,6 +135,7 @@ An offline version of this documentation is available for [download](https://l5l
 * [noCursor()](noCursor.md)
 * <s>[pixelDensity()](#)</s> (Not Implemented)
 * [print()](print.md)
+* [printToScreen()](printToScreen.md)
 * [width](width.md)
 * [windowResized()](windowResized.md)
 * [windowTitle()](windowTitle.md)

docs/reference/assets/printToScreen2.gif

@@ -4,7 +4,9 @@ Displays text in the command line console.
 
 `print()` is helpful for printing values while debugging. Each call to `print()` creates a new line of text.
 
-Note: Call `print()` to print a blank line. 
+To enable the output of print to display in the window, you can call `printToScreen()` in setup to turn this on.
+
+Note: Call `print()` on its own to print a blank line. 
 
 ## Examples
 
@@ -32,12 +34,12 @@ print(contents)
 
 ## Related
 
+* [printToScreen()](printToScreen.md)
 * [cursor()](cursor.md)
 * [deltaTime](deltaTime.md)
 * [describe()](describe.md)
 * [text()](text.md)
 
-
 ---
 
 *This reference page contains content adapted from [p5.js](https://p5js.org/) and [Processing](https://processing.org) by [p5.js Contributors](https://github.com/processing/p5.js?tab=readme-ov-file#contributors) and [Processing Foundation](https://processingfoundation.org/people), licensed under [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/).*

docs/reference/index.md

@@ -0,0 +1,70 @@
+# printToScreen()
+ 
+Displays `print()` text output in the running program window.
+
+`printToScreen()` is a helper function to enable viewing `print()` output without requiring running L5 from the console or an IDE. This allows, for example, a program to be run simply by dragging its project folder onto the *Love application* file.
+
+This works with `print()` to create values used while debugging. Each call to `print()` will produce a new line of text in the window.
+
+By default the print size is 16 but a font size can optionally be specified as an argument to the function.
+
+`printToScreen()` runs continuously overlaying on top of the drawn graphics. Calling `print()` within the `draw()` function will cause printed commands to scroll the text output continuously.
+
+## Examples
+
+![printToScreen example 1](assets/printToScreen1.webp)
+
+```lua
+function setup()
+  size(400, 400)
+
+  print('hello, world')
+  
+  printToScreen()
+
+  describe("prints Hello, World to the screen and console.")
+end
+```
+
+![printToScreen example 2](assets/printToScreen2.gif)
+
+```lua
+function setup()
+  size(400, 400)
+
+  printToScreen()
+
+  describe("prints the frameCount, increasing and scrolling the text output.")
+end
+
+function draw()
+  print(frameCount)
+end
+```
+
+## Syntax
+
+```lua
+printToScreen()
+```
+
+```lua
+printToScreen(fontsize)
+```
+
+## Parameters
+
+| Parameter |                                           |
+| -         | --                                        |
+| fontsize  | Number: Optional, size of font specified. |
+
+
+## Related
+
+* [print()](print.md)
+* [frameCount](frameCount.md)
+* [describe()](describe.md)
+* [text()](text.md)
+
+---
+