@ bradscotsanders
Exactly as rrfpacker says, position cursor on a solid part of the player body (top corners are usually good) and left click and hold down the mouse button. Now drag the player to the position you want it.
Think of the theme as being able to be divided into 3 vertical panels.
If you already have three panels, drag the player to the lower half of the centre panel and let it go. A lot of people like to have the Nodes tree in the left panel and use the right panel for MR, LV or artwork, etc.
Just remember that if you drop a player into the left or right panels, the panel will either increase in size to the size of the player (It won't necessarily reduce in size when you remove the player so you may need to resize it manually), or the player will be obliterated where it reaches the far edge of that panel.
It really is a question of trying out things to suit your own taste which is, of course, one of the best things about MediaMonkey....make it what YOU want it to be.
Hope this helps.
And thanks to rrfpacker for his swift response....unfortunately I'm not online that much at this time of year with the pressures of my business so he very kindly keeps an eye out