If your forum have many member with long and height signature.
You can use this mod to open or close signature of member

Template: postbit (_legacy)

Find:
<!-- sig -->
<div>
__________________<br />
$post[signature]
</div>
<!-- / sig -->


Replace:


<!-- sig -->
<div valign="bottom" align="left"><a href="#top" onclick="return toggle_collapse('sign_$post[userid]_1')">Ký tên: $post[username]</div> <div id="collapseobj_sign_$post[userid]_1" style="display: none;"> $post[signature]</div>
<!-- / sig -->


Screen on attach file.

:) Have fun and remember click install if mini mod is useful