StoreCenter Help : Online Editor : Customizable Product with User-Definable Size
Customizable Product with User-Definable Size
A shopper may want to use the Online Editor to create documents from scratch and not use a predefined size.This is possible for products that use the Unbound flat - Variable Size template base type, e.g. for posters, signs and cards. You can add content to the document and make it scale or move with the applied document size by using the Dynamic Layout settings (see “Dynamic Layout Function Formulas”).
Create a Customizable Product with user-definable size 
1 Create an InDesign document that contains a single blank page. Ideally the page size matches the most popular size shoppers will order, but this is not a requirement.
2 Add a text frame that uses all the fonts that you want to make available in the Online Editor and for which you have a license that allows online use. Put this text frame on a hidden layer.
3 Create color swatches if you that you want to make these available in the Online Editor. Users will not be able to add their own swatches in the Online Editor.
4 You can add content such as images or text frames that will be retained in the Online Editor. Keep in mind that StoreFront uses the top-left corner of the document as the point of origin when the source document is cropped or enlarged to the dimensions defined by the user. Use Dynamic Layout Function Formulas to make the content move or scale to the document size.
5 Export the InDesign document to a StoreFront package. Clear the option to include hidden layers. All the fonts you added to a hidden layer will still be maintained.
6 Create a product template with base type ‘Unbound – Flat – Variable Size’.
7 To avoid shoppers seeing a blank white rectangle if your document does not contain any image content, create a preview image that shows the shopper what he is buying.
8 Create a customizable product using the above-mentioned product template.
9 Upload the StoreFront Package and Preview Image you created.
10 Set the workspace to ‘Advanced’ or ‘Expert’ so that shoppers have the creative freedom to personalize the document.
NOTE: Maximum recommended dimensions: 508 x 508 cm.
 
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