Document units

As you create a new document, its document units will be set depending on the preset chosen. For example, presets for A-series page sizes will use millimeters as default, while US page sizes and photo page sizes use inches; for web-related page sizes, pixels are used.

You'll encounter document units when you're:

Moving/resizing layer content using the Transform panel
Drawing new vector content
Measuring between layer content and page elements
Using guides and grids
Using rulers

At any time, you can change your document units. These are saved with the document.

To set your document units for new documents:

On the File menu, select New.
From the New Document dialog, choose a preset, which sets the document units for that preset type.
(Optional) From the Document Units pop-up menu, change the unit type if needed, e.g. millimeters to pixels.

To change your document units at any time:

Do one of the following:

With the Zoom Tool selected, choose a unit of measurement from the Units pop-up menu on the context toolbar.
If you have rulers switched on, -click the ruler intersection and choose a unit type from the pop-up menu.

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