Itunes Match ... how do I see the music that's been downlaoded to device? I've looked a lot on the web for this and done a lot of trial and error on my end but I cannot for the life of me figure this out...

I have itunes match installed, it works great!  I can stream all of my itunes collection using wifi or celluar network.

It also has a neat option to download music to the device so that you can enjoy it when there's no data connection. However, how can I actually SEE what music is on my device and delete some music or manage it??  So confusing. If you scroll down a songs list, you can see indivdual songs that are downloaded to a device and delete them that way... howver, I just want to ideally be able to plug my iphone into my computer and see EXACTLY what music is on my device so I can delete some songs to add room.

I already have seen this link, but it doesn't exactly help me since I already everything listed for the information. http://support.apple.com/en-us/HT202675
You can see music thats specifically downloaded to your device, and only that music by going to:

Settings > Music

You will see an option for 'Show All Music' Turn this off. This will not delete any songs in iCloud nor change any other settings in your device or delete accounts related to iCloud or iTunes Match, this simply does what your requesting, only displaying actively downloaded music/videos. In fact, you can leave iTunes Match enabled and the results will conclude the same in your favor.

 

EDIT You can delete music thats downloaded to your phone in batches (currently by Artists only). However you can delete specific albums from that artist.

The following guide will take you to the respective settings:

Settings > General > Usage > Manage Storage (regular storage not iCloud storage) > Music 

Here you will see a list of downloaded music only. This is also where audiobooks are located! Cheers!