You could mock up the toolbar, and use separate artboards for each button location.
Define the areas needed for toolbar buttons in a macOS app.Artboards can be used to define export areas in your project, while also acting as a container for objects on the layers above. Artboard Layers reside beneath or between the layers of your project, and the objects on an Artboard Layer, known as Artboard Objects, have a direct effect on the objects residing on layers higher up in the stack. This chapter introduces you to a new layer-and object-type that’s only available in OmniGraffle Pro: The Artboard. For example, your project can have a single canvas with a single layer, a single canvas with multiple layers, or it can contain multiple canvases each with multiple layers.
As you learned in the previous chapter, your OmniGraffle projects can be as simple or complex as you need.
