Working with Layers - Adobe Illustrator CS6 on Demand - page 417

Did You Know?
You can duplicate a layer with the New Layer button. Drag the layer
over the New Layer button and Illustrator creates an exact copy of the
layer and appends the word copy at the end of the original layer name.
You can duplicate a layer by dragging a Selection square. Drag+Alt
(Win) or Drag+Option (Mac) the Selection square up or down in the
Layers panel to the location where you want to place the duplicate lay-
ers.
Locking Layers and Objects
When you don't want an object to be moved or modified, you can lock it in the Layers
panel. When you lock a layer, the objects remain visible in the document window. When
you click the edit (second) column in the Layers panel, a padlock icon appears, indicating
the layer is locked. When you lock a layer, all the objects on the layer are locked, includ-
ing all groups and sublayers. To unlock a layer, you simply click the padlock icon to re-
move it. You can lock/unlock individual layers, multiple layers, and top-level layers.
Lock and Unlock Objects and Layers in the Layers Panel
Select the Layers panel.
Use any of the following:
• Lock/Unlock Individual. Click the edit (second) column for each layer that
you want to lock or unlock.
• Lock/Unlock Multiple. Click and drag the edit (second) column.
• Lock/Unlock Top-Level. Click the edit (second) column for the top-level lay-
er.
All the layers in the top-level are locked/unlocked.
• Lock/Unlock Except One. Alt+click (Win) or Option+click (Mac) the edit
(second) column for a top-level layer to lock/unlock all the other top-level
layers except the one you clicked.