Update/Resize images from admin tools fails...

[grapher]

...after getting thru about 10 images.  The process times out on it's 30 sec limit.  How do I increase the time limit?

[Nibbler]

The limit is set in the server's php.ini, you may or not be able to change that. Depends on your host and server setup. If you can't then just process fewer images per click.