Get a grid like in RCT3

Hi, how do I get a grid like in RCT3 so I can place things in more precise locations? (for example I built a coaster but when I went to build walls round the station the walls and station didn't align)
 
I'm pretty sure that using a grid like the one in RCT3 doesn't give you more precision, the opposite actually...

If you want it to align, with a coaster station, click on the coaster and then hit the "edit" button, it should create a grid that is aligned with your coaster. Other than that, you can still align it with precision.
 
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