Hi narendrababu,

That is the admin console panel, the with/height setting of gallery will not effects it. If you want to change the size of the admin panel left side part, please try the way below.

1. Open file  "\CuteSoft_Client\Gallery\Editor\Explorer\Style.css".

2. Find section below, this is the style setting of the left side part, you can correct the style to match your own requirement. 

.GalleryEditorLeftFrame

{

      height:340px;

      width:135px;

      float:left;

      border-right:groove 1px gray;

      border-bottom:groove 1px gray;

      overflow:auto;

} 

Regards,

Ken