Page 490 - ProShow Producer 9 Final Manual
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             Adjustment Layers

             Adjustment layers have quite a few similar traits when compared to masks,
             especially when it comes to function and behavior.   However they do have
             some key differences.

             For many, the most commonly asked question about adjustment layers is
             “Why not just use a mask for this?”

             Masks are versatile and can be used for quite a few things, but there are
             situations where adjustment layers are the preferable option.  In most cases,
             you’ll find that adjustment layers are well suited for subtle enhancements to
             your slides, rather than being the keystone of an effect as is often the case
             with masks.
             When working with Adjustment Layers, it helps to understand how masks
             work in Producer to better understand what makes adjustment layers
             different.


             How Adjustment Layers and Masks are Similar
                •   Adjustment layers aren’t visible by themselves.
                •   Adjustment layers work with groups of layers at a time and affect
                    layers beneath them, changing their appearance based on how
                    the adjustment layer has been configured.

                •   The types of adjustment layers and the visual changes those types
                    can make are similar when using adjustment layers or masks.


             How Adjustment Layers and Masks are Different:

                •   Adjustment layers affect all layers beneath them, including the
                    slide background.  Masks only work with layers you’ve added to
                    the mask, which will never include your slide background.

                •   Masks control what you can see, Adjustment layers control how
                    the layers beneath them look.  This means any edits or other
                    changes you’ve applied to the adjustment layer will be seen on
                    every layer beneath it.
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