Without getting into specifics and jargon , to bump it down and set a longer exposure:

- Set to shutter priority
- Look inside the viewfinder
- starting bumping it down 2-5 stops with the slider
- watch the meter on the screen
- Further left the longer the exposure, vice versa for the opposite direction


and for god sakes man, read that manual LOL


But yeah, Matt is right, Manual is best if you know what you are doing. For quick daytime shots I usually use SP.