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What effect in Photoshop do you want to know
I dont know anythingabout photo shop
all photoshop
CS4 is version of software, and the name before CS4 is stand name of Software, for example Photoshop CS4 is: software Photoshop and version CS4. The Name of Software is Photoshop not Photo shop, please don't change. ---------------- If you want to know more about it then open photo shop and click on the help menu and select About Photoshop sub menu and then you will see and Photoshop about window. You can read there more about it.
You can open an eps file in either Photoshop or Illustrator, it helps to know if it is raster (use Photoshop) or vector (use Illustrator).
You should use a Apple Computer with Photoshop because the software is very Apple friendly. It;s also good to get a couple book's on the Particular version of Photoshop you have. You should know that Adobe Photoshop is that it really prefers that you use an Apple Mac computer, theirs alot of extras in the software that only work with the Apple Computer.
Quick keys are the best solution for faster photoshop work. The best photoshop professionals know most if not all quick keys to finish projects as fast as possible.
Photoshop has software that has walk-throughs. If you know what you want to do, you can look in help, and a "wizard" will come up and guide you through the process.
without having knowledge of photoshop if someone called himself as the photographer then it will sound a doctor without the stethoscope . I think it's a basic need to being a photographer as when you need to do with a photo then you will need a photoshop to do that.
Photoshop Elements is Photoshop but with less features, so Photoshop is better but it is professional level software. For home use or to get started Photoshop Elements is OK.
It depends on what version you want i don't know about Photoshop 7.0 and CS2 but CS3 is around 1.3 gb CS4 is around 1.6-1.7gb CS5 is around 2.5-2.7gb .
Photoshop does not require any computer language. You need to know English .