Using the Rendering Chain, you can generate a temporary still format for documents or videos, then modify the rasterized still images and apply rendering actions that may not be allowed directly on videos (e.g., Watermark). 

Alpha Handling action

The alpha handling modification handles alpha channels (transparency) in images, so transparency in PNGs is preserved when converted to JPGs (which have no transparency). 

Color Conversion action

The color conversion action is automatically applied in Fotoware Alto when needed. This converts images from CMYK print to RGB web.

Crop action

The crop modification crops your rectangle dimensions, starting at the x:y coordinates. 

Resize action

The resize modification resizes formats to a certain size. This is available for all file types (images, video, audio, and documents). 

Rotate action

You cannot select this rotate action or define properties, as it is automatically applied with predefined settings in Fotoware Alto. Images are automatically rotated based on their Exif metadata. 

Unsharp Mask action

The unsharp mask action allows unsharp masking based on the specified amount, radius, and threshold. The following values need to be defined: Amount of 1 to 500 percent, Radius of 0.1 to 1000.0

Watermark action

The watermark modification applies an image overlay. You need to store your watermark image (PNG, GIF, TIFF) on an absolute path on the server. Then you can define a distance from the four borders in pixels (margin-left, margin-top, margin-right, margin-bottom). You can leave the margins empty. You must set the opacity (0.1 to 1) used for transparency and an aspect ratio - the ratio of the width of a shape to its height (e.g., 8:5, 16:10, and 1.6:1 are the same aspect ratio).