Serif ECD518624M Datasheet download pdf (Page 166)

158 Layers and Masks

If you want to fine-tune a mask or layer's position independently of each

other it’s possible to unlink them. You may have noticed a small link button

between the layer and mask thumbnails on the Layers tab, i.e.

A click on this button will unlink the layer and mask, changing the button to

display a red cross through it (

). By selecting the layer or mask thumbnail, you

can then drag the layer or mask on the page, respectively. After fine-tuning, click

the button to relink the mask to the layer.

Masks and selections

Suffice it to say that a selection, which lets you isolate specific parts of the active

layer, often makes an ideal basis for a mask. Once you've created, modified, and

manipulated a selection, it's easy to turn it into a mask.

To create a mask from a selection:

1. Choose Mask>Add Mask from the Layers menu. Remember you can't

create a mask on a background layer!

2. To create a mask revealing the selected region, choose Reveal

Selection from the submenu. Pixels outside the selection will be 100%

masked.

To create a mask hiding the selected region, choose Hide Selection

from the submenu. Pixels outside the selection will be revealed.

You can also select part of an image to create a custom brush shape, for example

a textured brush or special shape.

Conversely, you can create a selection directly from the mask by Ctrl-clicking

on the layer’s mask thumbnail. Within the resulting selection, pixels that are

lighter on the mask (conferring more opacity) become relatively more selected.

This correlates with Paint to Select mode (see p. 42), where painting in lighter

tones also confers "selectedness."

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Serif ECD518624M Datasheet Page 166