No.2 Pencil
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Getting Started
When you first launch No.2, this is the screen you see. The built-in documentation will lead you through 6 pages of simple instructions.

Like other iPhone software, you can scroll around the page with one finger, or use two fingers to zoom in or out with pinch gestures.

Here, the only new thing to learn is how to control our "ring tool", which is the large circle in the center of the screen with thin cross-hairs in the middle. Use one finger to touch the ring anywhere and move it around the screen; you can position the cross hairs over any point in the image without it being covered up by your finger. The ring is translucent so you can see the drawing through it, and it is made up of light and dark areas so it can be seen floating above both light and dark images. You'll learn how to draw below.

But first we need to know how to get to the other instructions. To close a drawing or image in No.2, you tap on the "X" icon in the lower right corner. All of your drawings are stored in books, so this button returns you to the book containing the current image; you can see other pages in the same book or create a new one. It often takes a couple seconds for the drawing to be saved before it closes.

Open Another Page
After tapping on the close button, we see the current book. The pages are in the order you created them. What you see here is the "Documentation" book that is included in No.2 Pencil.

When you are looking at the contents of a book, you can scroll up and down (if there are more than 9 pages, you'll have to) or tap on a page to open it. The toolbar at the bottom of the screen gives you options for adding a new page to the book; we'll come back to that in a minute (see below).

In the top left corner, you can tap on the "Books" button to see all of your books, or create a new book. If you are using No.2 Pencil for the first time, it will automatically create this "Documentation" book and a "Drawings & Art" book with a sample image in it.

We've already seen the "Welcome" page, and we want to learn how to draw, so we tap next on the "Draw" page to open it.

Now we are ready to start drawing. While a finger is on the ring tool, just tap with a second finger to start or stop drawing. It could be any finger, on either hand, anywhere on the screen. It is a lot like clicking a mouse button. You must keep one finger on the ring tool while you tap with the second finger.

The ring will shrink a bit while drawing, so you know it is engaged and so it covers less of the image below. The ring tool lets you hold it from any angle, position it in the exact pixel you want the line to start on, see the line while you draw it, then stop on the exact pixel you want to stop on. Other touches on the screen allow simple and quick scrolling and zooming. It is effortless to re-position the image frequently so it is in the best position for each new stroke.

But you still might make mistakes. You can always erase your mistakes by sampling the background color (we'll see how to do that next), but since you are using a computer you can also just undo the last thing you drew. Tap the arrow in the bottom left corner to undo, or if you change your mind, tap the arrow again to redo the line.

Colors and Lines
The ring tool can be used to draw thin or thick lines in any color. To change these settings you can double tap the ring tool, or you can tap the ring tool icon in the toolbar at the bottom of the screen. A new toolbar appears showing the current color in the middle. To close this toolbar and return to the main toolbar, tap on the down arrow in the bottom right corner.

The icon on the far left will let you change the pen size. The range is from a single pixel width up to ten pixels. The pen size is also shown in the center of the ring tool (the size shown is at the native resolution and does not change when you zoom in and out).

To the right of the pen size button is an eye dropper. When you tap on the eye dropper button, it samples the color of the pixel under the ring tool. This will become the new current color and you can now draw lines of that color. This is a great way to retouch photos.

Finally, to the right of the current color box, is a color wheel button. This will bring up the full screen color picker. Our color wheel is based on the RGB color spectrum. Pure red, green, and blue are placed in a triangle at the edge of the wheel. They mix together with the others as you move away from these "pure corners" with them all mixed equally at the center to make white. Just below the color wheel are shortcut buttons for pure black and white, then below that are sliders for brightness and translucency ("alpha"). The current color will be updated at the bottom of the screen as you adjust these controls. Tap the green checkmark at the top of the screen to close the color picker, or tap on the current color or the color wheel buttons in the bottom tool bar.

Those are all of the drawing tools, so you're almost ready to create a new image. When you close a drawing and you're looking at all the pages in the current book, there is a toolbar at the bottom of the screen with four options for new images.

Starting on the left is a plus sign that adds a new blank drawing. This drawing is 640x960 pixels in size. It will appear zoomed out to fit the screen, so you may want to zoom in a bit before drawing. Double tap the image (not the ring tool) to zoom to a native 1:1 resolution.

Next, is the camera button. If you have a camera, this will let you take a photo and use it for a new image. Currently, we are scaling down the photo to fit in a 960x960 pixel area, but we hope to allow editing of full resolution photos in the near future. If you do not have a camera, this button is grayed out.

To the right of the camera is a button to import an image from your photo library. This image will also be scaled down, if necessary, to fit in a 960x960 pixel area. You could also use this to import screenshots from apps that don't support copy/paste (take a screenshot of any app by briefly holding down both the power button and the home button!).

Finally, in the bottom right corner is a clipboard button. This will use any image you've copied from another app and will paste it into a new image. You can copy images from websites, emails, or other drawing/graphics apps. You can also crop and copy an image in No.2 and then paste it into a new image; an easy way to create duplicate pages or smaller detail images or move an image from one book into another.

You've seen how to get images into No.2 from your camera, photo library, or by pasting from the clipboard, but what can you do with an image after you've finished working on it?

Tapping on the menu button will bring up export and delete options. Each export option also tells you what file format it will be saved as: Email (png), export to photo library (jpg), or crop and copy (png). The final option, which copies the image to be pasted elsewhere, will also crop the image to the edge of the screen so that you can zoom in and copy just a small piece of an image. The other two options will export the entire image regardless of zooming or scrolling.

Getting Help
And if that isn't enough information for you, we will also have a selection of video tutorials available on our website very soon, and you can contact us by email for personal help.

We always love to see what people are doing with No.2 Pencil, so email us some drawings if you feel like sharing; we also have a group on Flickr.

Also on our website, you can find our master feature list of things we are considering for future upgrades, FAQs and our development blog.