Stencils

Start with OmniGraffle for iPad's built-in Stencil collection for fast document creation: just touch and hold a shape, then drag it into the canvas. If you prefer a more hands-on approach, tap the Draw button in the toolbar to enter Draw mode. Choose the shape you want from the Shape Inspector, then drag out custom-sized shapes. To draw a line, just touch and hold the canvas, then drag. Adjustable shapes such as stars and circles can be manipulated with the touch of a finger, so you can easily change a 5-pointed star into an 12-pointed star (and decide just how pointy you want its points to be) or draw a perfect quarter-circle. 

Built-in stencils include Shapes, 3D Shapes, Connections, Fonts, Fills, Software, and Variables. Many third-party OmniGraffle stencils are also supported.

Diagramming Tools

OmniGraffle for iPad knows what makes a diagram different from a drawing, and can keep lines connected to shapes even when they're moved. In Draw mode, touch and drag to connect shapes together. The Diagram Layout inspector gives you several options for automatically rearranging your diagram—touch "Lay out now" and your shapes will be magically organized across your canvas. Use the standard pinch gesture to zoom in and out, so you can focus on a detailed area of your canvas, or zoom out to see the big picture.

Stylish options

When it comes to styling the elements of your diagram, the sky's the limit. Quickly choose colors from built-in themes, or create your own custom colors with support for HSB, RGB, and grayscale. OmniGraffle supports linear and radial fills, blending up to three colors with customizable centers and angles. You can set stroke/line thickness, color, and combine single or double strokes with over two dozen dashed line styles. Each shape can have a transparent shadow which falls on objects or layers that are behind it. You can decide just how fuzzy or sharp you want the shadow to be, as well as choosing its position, color, and transparency.

Shared layers

Each canvas in your document supports multiple layers, which you can reorder, lock, duplicate, and turn invisible. You can also share items between your canvases with shared layers. When you have common elements that you'd like to display on different canvases, shared layers make it easy to keep them updated. Change any object on a shared layer (a logo, a background, a wireframe) and the change instantly shows up on every canvas that shares the layer.

Tables

Any two shapes in your OmniGraffle document can be combined into a table. Just select the shapes and bring up the contextual More… menu, then choose Make Table. Drag the handles to create more rows and columns, add text to the individual cells, and style each cell as you see fit.

Text wrap

Text can be wrapped to fit within a shape or automatically adjust the shape's size to contain the text.  You have full control over the text's horizontal and vertical margins and alignment, and can choose between dozens of fonts.  And, of course, text can be any color you choose.