Adobe Illustrator CC 2015 - Manual (Page 262)

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Selecting and arranging objects
Last updated 6/5/2015
Selection column Indicates whether items are selected. A color box appears when an item is selected. If an item, such
as a layer or group, contains some objects that are selected and other objects that are unselected, a smaller selection
color box appears next to the parent item. If all of the objects within the parent item are selected, the selection color
boxes are the same size as the marks that appear next to selected objects.
You can use the Layers panel to display some items as outlines and other items as they will appear in the final artwork.
You also can dim linked images and bitmap objects to make it easier to edit artwork on top of the image. This is
especially useful when tracing a bitmap image.
A Object displayed in Outline view B Bitmap object dimmed to 50% C Selected object displayed in Preview view
More Help topics
Workspace basics
View artwork as outlines
Trace artwork
Lock or unlock objects or layers
Hide or show objects or layers
Change the display of the Layers panel
1 Choose panel Options from the Layers panel menu.
2 Select Show Layers Only to hide paths, groups, and collective elements in the Layers panel.
3 For Row Size, select an option to specify the height of rows. (To specify a custom size, enter a value between 12 and
100.)
4 For Thumbnails, select a combination of layers, groups, and objects for which to display thumbnail previews.