How do i change the shutter speed on a Minolta Maxxum 4?

I'm trying to learn how to light paint and i need to slow the shutter speed down on the camera. It's a Minolta Maxxum 4?

Can someone please help me.

PS its not digital
How do i change the shutter speed on a Minolta Maxxum 4?
I've never handled the Maxxum 4, but if you use the link below, you can see or download a PDF file of the operators manual for your camera. I hope this helps.