There is no shortage of advice for users to improve the performance of Photoshop. RAM is always king, the more you have, the better off you are. But having it isn’t enough, you have to know how to manage it.
Here are a few things that have helped me improve performance in Photoshop CS5 (though they’ll most likely work just fine in versions CS3 and CS4 as well).
Memory
Go into Photoshop’s preferences (Command + K) and select the Performance item from the source list on the left. The first thing to adjust is the Memory Usage. I generally keep the RAM set between 60-70% with the slider. This allows me to use a good amount of my RAM for Photoshop, but still leave enough for other apps and the System itself. However, if you have less than 4GB of RAM, you should probably stick to 50% max. Your mileage may vary.
Memory use and cache settings improves performance
History & Cache
The next thing to adjust is your History & Cache settings. You can use the preset buttons (hover over them for a brief description of which you should use). Only my laptop, I use the settings you see in the screenshot above. Because I tend to use my laptop for web or other low-resolution work, the settings have worked superbly.
3D VRAM
If you’re running Photoshop CS5 Extended, you can also check the 3D preferences and up the VRAM (video RAM) use to the max amount. I don’t do any 3D work, so I can’t tell you how well this works or not, but I keep it set to the max anyway.
Layers Panel
If you work with a lot of layers in your Photoshop document, you can reduce the size of the individual icon layer thumbnails. The smaller the icon, the less memory Photoshop needs to redraw those thumbnails every time you make a change to a layer. Just make a quick trip to the Layers panel flyout menu and choose the Panel Options… menu item. You can also turn those layer thumbnails off completely if you’re really organized with layer naming.
The Rest
There are numerous other tips that can help speed up Photoshop. Limiting the number of fonts installed and active is huge. You can also limit the number of files Photoshop remembers in the File menu list (adjust in the Photoshop preferences). Keep the layer count down as much as possible goes a long way, and not using Photoshop’s built-in Navigation panel with its giant thumbnail is a great idea as well.
Adobe has made available an extension which provides initial support for HTML5 and CSS3 in Adobe Dreamweaver CS5, and helps you easily create HTML5 pages and CSS3 styles. It also includes updates and WebKit improvements for Design View and Live View rendering.
Adobe has packed a lot of nice features into the 
But the corner-editing goodness doesn’t end there. For many designers, a more free-flowing workflow is more desirable. For those folks, Adobe added the ability to edit the corner radius without going into a dialog box at all. When you select a rectangle, you’re offered a small yellow handle on the side of the object (as seen at right). Clicking on that yellow handle activates the new Corner Option editing mode.
Once activated, you can adjust the corner radius of all four corners at once simply by clicking one of the yellow handles which appear at each corner and dragging. A small bezel appears to let you know the radius amount. This in itself would be obscenely helpful to me, and I would have been happy had Adobe stopped there, but they didn’t.
The new version offers a simple list of icons you can choose to install on the left. On the right, you’re shown components included with the installation of each app you have chosen. You can choose to not install those “optional” components if you wish, but you’ll likely have to do it more than once if you’ve purchased the Design, Web, Production or Master collection. For instance, Adobe AIR is part of the install for more than one app, so turning off the install for one app will simply result in it being installed with another one. To be honest, I don’t think you have any choice in the matter, you WILL have AIR installed.
With the recent announcement of Creative Suite 5 by Adobe this past week, and the subsequent complaining that always seems to accompany such an announcement, I thought I would type-up a quick complaint letter that interested people can copy & paste into an email and send off to Adobe. Perhaps if those of you who aren’t happy with the direction Adobe is going in send this letter to them, they’ll completely toss 20+ years of successful software into the bin and start over from scratch!
