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The "trap" command in Photoshop should not be used.
The description below is correct, but trap is press-dependent: I have a five-tower newspaper press, and all five towers need a different amount of trap. The printer will apply the amount of trap he needs for whatever press he runs your job on.
There's also no need to trap inside of a photograph.
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A trap is an overlap that prevents tiny gaps in the printed image caused by a slight misregistration on press. Contact your service provider before you do any trapping. In most cases, your print shop determines whether trapping is needed. If so, the print shop staff will tell you what values to enter in the Trap dialog box.
Trapping is intended to correct the misalignment of solid colors. In general, you don't need traps for continuous-tone images such as photographs. Excessive trapping may produce an outline effect. These problems may not be visible on-screen and might show up only in print. Photoshop uses standard rules for trapping:
All colors spread under black.
Lighter colors spread under darker colors.
Yellow spreads under cyan, magenta, and black.
Pure cyan and pure magenta spread under each other equally.
Save a version of the file in RGB mode, in case you want to reconvert the image later. Then choose Image > Mode > CMYK Color to convert the image to CMYK mode.
Choose Image > Trap.
For Width, enter the trapping value provided by your print shop. Then select a unit of measurement, and click OK. Consult your print shop to determine how much misregistration to expect.
What else can I help you with?
How do you close Photoshop on a mac?
Command + Q.
How can I use Photoshop to cut a layer in my design project?
To cut a layer in Photoshop, select the layer you want to cut and then use the "Cut" command from the Edit menu or press CtrlX on your keyboard. This will remove the selected layer from your design project.
What does command A mean in photoshop and illustrator?
On a Mac Command A means select all. In Windows it is Control A
Can Photoshop images be placed in Illustrator documents?
yes,import command
What are the steps to turn on a ruler?
In Photoshop: Ctrl-R or Command-R.
How can Photoshop shape be created?
The custom shapes can be created using the pen tools within Photoshop, you can create them via work paths, you can use type to create custom shapes by converting a letter or more into a custom shape. Personally, I use Illustrator to create custom shapes and copy the shapes to Photoshop and then use the define custom shape command (found in the edit menu)
How do you get to huesaturation in adobe Photoshop?
For Windows: cntrl + u For Mac: Command + u
What's the best way to change an iPhone photo to 300 dpi for small BW printing in a book using photoshop?
Use the Image Size command.
What Photoshop do you use to make a blue avatar?
you can use any photoshop but i tend to use CS3 or CS4
How do you add an image on an image on adobe photoshop?
You probably mean how to combine images. There are several ways to do that in Photoshop: open 2 images in Photoshop, convert background layer to normal for image nmb. 2 then drag it into window with image 1. Another way is to use File > Place command to import image from hard drive into document with already open image in Photoshop.
What is the trap command on Unix for?
The trap command is used in a shell script to intercept certain types of software signals; usually it is used to do a "graceful" cleanup when the shell program is interrupted.
What artists use Adobe Photoshop?
Most digital and graphics design artists use photoshop. Those who can't afford Photoshop usually use GIMP or Corel Paint Shop
