Save For Web Preferences (PSCS>CS4)
The Save for Web preferences can be deleted by holding down CTRL+ALT whilst selecting 'Save For Web' in the File Menu. (This shortcut has been removed in CS5)
If you wish to delete the Save for Web preferences manually, they are located at:
Windows XP: c:\Documents and Settings\~username\Application Data\Adobe\Save for Web\8.0\ (\9.0\ for CS2... up to 12.0 for CS5)
Windows Vista or Windows 7: C:\Users\username\AppData\Roaming\Adobe\Save for Web\12.0\Adobe Save for Web 12.0 Prefs
Is one of your tools behaving strangely — or not the way you expect — in Photoshop?
For every tool in Photoshop's Tool Box, the user may choose to fully reset JUST that tool to its default settings. To do this, look up to the Options Bar. On the far left side you will see a button which displays an icon of the currently selected tool. This is the Tool Preset picker. Right-click on this button, and you will see two entries:
- Reset Tool
- Reset All Tools
The first thing to try when a tool is not acting like you expect it should is to apply the command "Reset Tool" from this menu. Often this will cure a problem, and by starting your Photoshop troubleshooting with this procedure you aren't resetting Photoshop's entire behavior and environment to factory default in a wholesale manner. Instead, you're just getting that particular tool back to its default settings, leaving the rest of Photoshop's settings alone.
The second option would be more appropriate in a classroom setting, to get a "fresh version of Photoshop", rather than for troubleshooting Photoshop issues.
If this doesn't cure the problem you're having, then you may need to move on to deleting/resetting all of your Photoshop preferences to factory default.
The thread has been updated with links for CS5, different windows versions, a note about the updates, a faster shortcut for the reset tools option, and updated the SFW with CS5 specific info.