Definition 

In GdPicture.NET an editable multipage tiff image is a GdPicture Image with some particularities & features: 

- This kind of image contains one or multiple pages. 

- Each of page can be edited (resize, filters, effects...). 

- Each of page can be deleted. 

- Pages can be swapped. 

- New pages can be added. 

See Multipage TIFF Manipulation section of this documentation to see specific features of this format. 

How to create an editable multipage tiff image ? 

There is two ways: 

1- Direct method, calling only one function 

Using TiffCreateMultiPageFromFile or TiffCreateMultiPageFromGdPictureImage function. Each of these functions always returns a GdPicture Image marked as editable multipage tiff image. 

2 - Indirect method, using the standard function 

Call the TiffOpenMultiPageForWrite method using True as parameter. 

Create a GdPicture Image using one of the generic loading function (IE: CreateGdPictureImageFromFile). 

Warning: With this method, an editable multipage tiff image is created only is the loaded image is multipage tiff image. 

How to check if a GdPicture Image is marked as editable multipage tiff image ? 

See the TiffIsEditableMultiPage function.