Adobe 13102498 - Photoshop CS3 - Mac User Manual page 298

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. For more information,
see "Display file information in the document window" on page 39.
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 trans-
parent areas in the merged layers remains transparent.
Note: You cannot use an adjustment layer 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.
Merge two layers or groups
Make sure that the layers and groups you want to merge are visible.
1
Select the layers and groups you want to merge.
2
3 Choose Layer > Merge Layers.
Note: You can merge two adjacent layers or groups by selecting the top item and then choosing Layer > Merge Down or
Merge Group. You can merge linked layers by choosing Layer > Select Linked Layers, and then merging the selected
layers.
Merge layers in a clipping mask
Hide any layers that you do not want to merge.
1
2 Select the base layer in the clipping mask. The base layer must be a raster layer.
Choose Merge Clipping Mask from the Layers menu or the Layers palette menu.
3
For more information on clipping masks, see "Mask layers with clipping masks" on page 323.
Merge all visible layers and groups in an image
❖
Choose Merge Visible from the Layers palette or the Layers palette menu. All layers showing an eye icon are
merged.
Note: A visible layer must be selected to enable the Merge Visible command.
PHOTOSHOP CS3 291
User Guide