---
title: "Interface: IBaseSurfacesDefinition | Customer's Canvas On-Premises"
canonical: "https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfacesDefinition/"
---

# Interface: IBaseSurfacesDefinition

> A structure holding basic features of multipage templates.

## Example

``` js
const productDefinition = {
   surfaces: {
       // Get surfaces from a folder containing three PSD templates.
       designFolder: "BookCover",
       // Name the surfaces.
       names: ["Front cover", "Endpapers", "Back cover"]
   }
};
```

## Extends

- [`IBaseSurfaceDefinition`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md)

## Extended by

- [`ISurfacesFromFolder`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.ISurfacesFromFolder.md)
- [`ISurfacesFromMultipageTemplate`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.ISurfacesFromMultipageTemplate.md)

## Properties

### name?

> `optional` **name?**: `string`

A name of a surface (a page) in the product.

#### Remarks

In multipage products, it allows you to use a name mask for product surfaces. If this string contains the `{0}` placeholder, it will be replaced with a page number, starting from `1`. For example, `name: "Page {0}"` specifies the following page captions in the Bottom toolbar: `Page 1`, `Page 2`, and so on.

#### Inherited from

[`IBaseSurfaceDefinition`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md).[`name`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md#name)

***

### foldingLines?

> `optional` **foldingLines?**: [`IFoldingLine`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IFoldingLine.md)[]

A collection of folding lines defined in the surface (page).

#### Inherited from

[`IBaseSurfaceDefinition`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md).[`foldingLines`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md#foldinglines)

***

### spines?

> `optional` **spines?**: [`ISpine`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.ISpine.md)[]

A collection of spines defined in the surface (page).

#### Inherited from

[`IBaseSurfaceDefinition`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md).[`spines`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md#spines)

***

### bgFoldingMode?

> `optional` **bgFoldingMode?**: [`IBgFoldingModeParams`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBgFoldingModeParams.md)

Parameters of the background folding mode.

#### Inherited from

[`IBaseSurfaceDefinition`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md).[`bgFoldingMode`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md#bgfoldingmode)

***

### proofImage?

> `optional` **proofImage?**: [`IProofImage`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IProofImage.md)

Settings of proof images.

#### Inherited from

[`IBaseSurfaceDefinition`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md).[`proofImage`](https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/interfaces/ObjectModel.IBaseSurfaceDefinition.md#proofimage)

***

### names?

> `optional` **names?**: `string`[]

An array of surface names. The number of array elements must match the number of surfaces. Otherwise, the default page captions appear in the Bottom toolbar.