Adjust the Number of Images in the Add Image Browser?

Unsure whether this is a support or feature request.

The link to add images brings up an image browser which shows 6 images at a time, i.e., each "page." I have a library of 350 images and growing. This doesn't really work.

Is there a way to adjust the number of thumbnails displayed per page in the Add Image browser window?

I've been through the three image related menus - Image assist, Image toolkit, and Images, and just not finding how to set this.

Am I missing something or is this a fixed number? If the latter -- adjustable might be an improvement. If the former, would someone please point me in the right direction?

Thx.