Are you saying you already have the resizeable text input box when submitting or updating a post and you want that text input box to open to an enlarged size by default?
An idea is to set a default CSS stylesheet in the browser that you use to view the forum...
Browser's used to have a setting to set a CSS stylesheet as the browser default - overriding the browser's original default stylesheet.
I'm not sure which browsers if any allow you to do that still.
Here's a
Google search that may answer that.
Here's the HTML that defines this textarea that i'm currently typing in:
<textarea dir="ltr" tabindex="1" style="display:block; width:540px; height:250px" cols="60" rows="10" id="vB_Editor_001_textarea" name="message"></textarea>
So your new CSS stylesheet would have to define:
<style type="text/css">
#vB_Editor_001_textarea {
height: ???px;
width: ???px;
}
</style>
You could also create a browser bookmarklet which contains this javascript instead of a webpage URL:
javascript:var t=document.getElementById('vB_Editor_001_textarea'); t.style.width='300px';t.style.height='640px'
Clicking that bookmarklet would (in theory) do what you want BUT it seems as though modern browsers block execution of such javascript.
If you copy/paste that javascript into your browser address bar when the forum add or modify a post page is loaded does it work or do your browser settings block it?
Martin.