Delete a layer or group, Export layers, Track file size – Adobe Photoshop CS4 User Manual
Page 303: Merge and stamp layers
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USING PHOTOSHOP CS4
Layers
Last updated 1/10/2010
Layer
Rasterizes all vector data on the selected layers.
All Layers
Rasterizes all layers that contain vector and generated data.
Note: To rasterize linked layers, select a linked layer, choose Layer
> Select Linked Layers, and then rasterize the selected
layers.
Delete a layer or group
Deleting layers you no longer need reduces the size of your image file.
1
Select one or more layers or groups from the Layers panel.
2
Do one of the following:
•
To delete with a confirmation message, click the Delete icon
. Alternatively, choose Layers > Delete > Layer or
Delete Layer or Delete Group from the Layers panel menu.
•
To delete the layer or group without confirmation, drag it to the Delete icon
, Alt-click (Windows) or Option-
click (Mac
OS) the Delete icon, or press the Delete key.
•
To delete hidden layers, choose Layers > Delete > Hidden Layers.
To delete linked layers, select a linked layer, choose Layer
> Select Linked Layers, and then delete the layers.
Export layers
You can export all layers or visible layers to separate files.
❖
Choose File
> Scripts
> Export Layers To Files.
Track file size
File size depends on the pixel dimensions of an image and the number of layers it contains. Images with more pixels
may produce more detail when printed, but they require more disk space to store and may be slower to edit and print.
You should keep track of your file sizes to make sure the files are not becoming too large for your purposes. If the file
is becoming too large, reduce the number of layers in the image or change the image size.
❖
You can view file size information for an image at the bottom of the application window.
More Help topics
Display file information in the document window
Merge and stamp layers
When you have finalized the content of layers, you can merge them to reduce the size of your image files. When you
merge layers, the data on the top layers replaces any data it overlaps on the lower layers. The intersection of all
transparent areas in the merged layers remains transparent.
Note: You cannot use an adjustment or fill layer as the target layer for a merge.
In addition to merging layers, you can stamp them. Stamping allows you to merge the contents of more than one layer
into a target layer while leaving the other layers intact.
Note: When you save a merged document, you cannot revert back to the unmerged state; the layers are permanently
merged.