Tiger Style Admin ruins my writing space

Try using the Firebug extension in Firefox to identify how the textarea is being styled. The Tiger Style admin plugin is based only on CSS changes I think, so my guess is that it will most likely be a CSS issue.

Once you’re found the tag being affected, look at the properties of the inspected element and mess around with the element’s parameters (in particular, widths, padding and margin values) to see if you can make a simple CSS change. I haven’t installed the Tiger plugin, but it will have it’s own CSS sheet that it references. That’s what you’ll want to edit.

Make a backup first!

Cheers