ADS layout editing

i was wondering if somebody tell that is there some type of cutting tool in ADS-layoout,
i want to draw first a rectangle and then want to cut its some portion for tunning..

can u help me out?

select the artwork, right click then use crop or chop to cut the layer

if you want to edit rectangle to rectangle/square, you can do that by selecting your figure, keep left mouse on the corner and drag till required size.
You can also crop you figure by clicking right mouse ->modify->crop.
Other options're available there, too.

but crop function is not working!

it should work as we are fine with it.