You would simply adjust the height of the module within the relative css rule – in this case, topsl within the template.css file.
For example, I wanted to do the same thing, so I simply modified the topsl css parameter as follows:
#ja-topsl {
height: 240px;
}
As I see you are using J 1.5, there are also adjustable parameters within the Module itself – which you can access via your Module Manager. Simply open up the JA Slideshow module (which should be assigned to the topsl position) and adjust the height and width parameters.
It may take some trial and error to get it just right – and it may or may not require you to adjust the adjacent module positions as well.
Nevertheless, it can be done relatively easily.
GOOD LUCK !!!
