Layers

When creating complex artwork, it’s a challenge to keep track of all the items in your document window. Small items get hidden under larger items, and selecting artwork becomes difficult. Layers provide a way to manage all the items that make up your artwork. Think of layers as clear folders that contain artwork. If you reshuffle the folders, you change the stacking order of the items in your artwork. You can move items between folders and create subfolders within folders.

The structure of layers in your document can be as simple or complex as you want it to be. By default, all items are organized in a single, parent layer. However, you can create new layers and move items into them, or move elements from one layer to another at any time. The Layers panel provides an easy way to select, hide, lock, and change the appearance attributes of artwork. You can even create template layers, which you can use to trace artwork, and exchange layers with Photoshop.

For a video about keeping your artwork flexible and organized by using layers in your document, see Organize artwork with layers.

You use the Layers panel (Window > Layers) to list, organize, and edit the objects in a document. By default, every new document contains one layer, and each object you create is listed under that layer. However, you can create new layers and rearrange items to best suit your needs.

By default, Illustrator assigns a unique color (up to nine colors) to each layer in the Layers panel. The color displays next to the layer name in the panel. The same color displays in the illustration window in the bounding box, path, anchor points, and center point of a selected object. You can use this color to quickly locate an object’s corresponding layer in the Layers panel, and you can change the layer color to suit your needs.

When an item in the Layers panel contains other items, a triangle appears to the left of the item’s name. Click the triangle to show or hide the contents. If no triangle appears, the item contains no additional items.

The Layers panel provides columns to the left and right of the listings. Click in a column to control the following characteristics:

The Release To Layers command redistributes all of the items in a layer into individual layers and can build new objects in each layer based on the object’s stacking order. You can use this feature to prepare files for web animation work.

Merging and flattening layers are similar in that they both let you consolidate objects, groups, and sublayers into a single layer or group. With merging, you can select which items you want to consolidate; with flattening, all visible items in the artwork are consolidated in a single layer. With either option, the stacking order of the artwork remains the same, but other layer-level attributes, such as clipping masks, aren’t preserved.

• To merge items into a single layer or group, hold down Ctrl (Windows) or Command (Mac OS) and click the names of the layers or groups that you want to merge. Alternatively, hold down Shift to select all listings in between the layer or group names you click. Then, select Merge Selected from the Layers panel menu. Note that items will be merged into the layer or group that you selected last.

  Layers can only merge with other layers that are on the same hierarchical level in the Layers panel. Likewise, sublayers can only merge with other sublayers that are within the same layer and at the same hierarchical level. Objects can’t be merged with other objects.

• To flatten layers, click the name of the layer into which you want to consolidate the artwork. Then select Flatten Artwork from the Layers panel menu.

When you select an item in your document window, you can quickly locate the corresponding item in the Layers panel using the Locate Object command. This command is especially helpful for locating items in collapsed layers.