Change arrows position

I'd like to lower down arrows position as shown in this image: http://puu.sh/iMYuH/6c221f3be1.png
Anyone can help?

In the metrics of that theme, find the "[player]" and you will see something like "reversearrowposition=-180" change the negative value to a "bigger negative number" so it will lower the receptor.

Thanks a lot, worked!

Another question, is there a way to resize notes and make them smaller in solo mode?

Yes, use the "mini" mod. But if this is too small for you then you can edit it to make it bigger.

Okay, to make the "mini" mod bigger do I need to edit the metrics.ini? If yes, what part?
Also, how do I move the solo gameplay from the center to the left of the screen?

go to the fallback metrics and look for "[Screenoptionsmaster]" and do something like this

Did it but nothing changed

Did it but nothing changed

To make the arrows BIGGER, you must invert the mini mod to make it negative, more like "-40% mini". The "40% mini" without the minus is just making the mini mod effect slightly less.

Say, if you used "mini" it means "100% mini".
"-100% mini" doubles the size of the arrows.
"-500% mini" doesn't let you see anything because the arrows are too big.
"200% mini" makes the arrows too small.

Experiment, m'boy.