# User Interface

1. Input Preview
   This is the area where any document opened with Create Booklet will be displayed. For instance, you've just downloaded the PDF manual of your new machine and want to print it as a booklet. Once dropped onto or opened with Create Booklet, all pages of the document will be displayed in this area. Note that at the same time, the app will instantly generate the preview of your future booklet layout on view ③.
   The input preview area is quite powerful. From here, you can:
   - Rearrange pages at will by just dragging them.
   - Add pages like a multipages PDF, images, blank (Drag & Drop also works).
   - Remove pages by just pressing `⌘``del` or using the menu Pages Delete page

   Note: If you modify an opened PDF by rearranging, adding, or removing pages and close the window, Create Booklet will save those modifications to your input document, so make a copy if you want to keep your original PDF unchanged.

2. Features
   Create Booklet provides a large set of features. They can be activated using the checkbox next to it. Features are:
   - Output Format: To choose the paper size for the booklet to be printed on.
   - Page Layout: To zoom and position input pages on the output format.
   - Reverse Order: Typically for right to left language documents.
   - Straight Order: Will not produce a booklet but just print pages in order, side by side. "Split Into" option will deactivate.
   - Add Page Numbers: If your input document doesn't have any.
   - Split Into: When printing a large amount of pages, splitting into multiple thin booklets helps to staple and hold the pages easier.
   - Creep Compensation: Will compensate the creep according your paper thickness.
   - Show Staple Markings: First and Last sheets will get markings printed on, to help you center the staple.
   - Rasterize: PDFs can have bugs that prevent them from printing or re-saving correctly (missing pages or parts, etc.). If you experience such an issue with your PDF, Create Booklet can try to help you by rasterizing the full document.
3. View Type
   There are two types of views in Create Booklet. The adjust mode displays layouted pages in a single sheet of paper and allows you to adjust all left / right pages at onces by zooming and positioning them. The preview mode shows a virtually assembled booklet. You can verify how it will look like after being printed and folded.
4. Booklet Preview
   This area represents the sheet of paper used to build your booklet. The ratio matches the output print format set as first preference on the features ②. On this virtual sheet of paper, Create Booklet automatically places and layouts each of your input ① documents pages.
5. Navigation Arrows
   Use the navigation arrows to browse your booklet, either in adjust mode or like a virtually assembled final booklet.
6. Export and Print
   When done with your booklet setup, you can either decide to export it as a new PDF and get it printed by some printing services, or you can instantly use your own printer and get your booklet right away. The first time, Create Booklet will ask some details about your printer's features.