I'm using Drupal 6.12, FCKeditor module 6.x-1.3, and FCKEditor 6.2.4. Basically the latest versions of everything. Your mileage may vary.
I've been modifying the look and feel of Drupal's basic edit node page. Because of that, it was easy to modify the Drupal template so that the editor is 60 rows and 80 columns, but you don't need to do that. If you did anyway, you'd find like other users that when the editor loads, the window resizes to 420px. That's how I got here, and it was decidedly not groovy.
As others have commented here, the height resize is hard-coded FCKeditor behavior. Pretty lame, given there's an easy way in the admin section to specify the width but not the height. Here's how to change it:
Go to where you installed FCKeditor (e.g., modules/fckeditor) and open up fckeditor.module in your favourite text editor. (It's just a PHP file.) Change the following line (for me it was line #983)
". $js_id .".Height = \"". $height ."\";
Re: Resizing default editor size with Drupal (solution)
You wouldn't believe how hard it's been for me to even find out what template is used to render the basic edit node page. The devel module's themer-info thing doesn't seem to want to work on admin pages, and Drupal's website is useless.
Can you tell me what the name of this template is, and where or how (specifically) I might go about changing the size of the FCKEditor-enabled edit window?
cheers in advance.
Re: Resizing default editor size with Drupal (solution)
This way, updates don't overwrite your changes and you can set the number of rows for any textarea. Uncomment the //echo $form_id; to see what the form id is for other forms that might need to be modified.