If you want to get started unwrapping UVs in Blender with just basic pelt mapping for a
Organic surface such as this head here
We the first thing that we want to do is we want to set our seams to set our seams we need to go into
Edit mode so we're gonna hit tab on my model here
You can see I'm in vertex select mode and I want to place a seam
Right up the forehead down the back of the head fairly standard like I'm gonna select the bottom vertex here where I want the seam
To stop I'm gonna select the base that the neck here
I'm gonna hit W to bring up my specials menu and I'm gonna choose select vertex path and
By default this will probably be set to edge length
But you can also change it to topological here in the operator panel
Which remember you can access this operator panel by pressing F6 and that will select all the edges that I want
I can then simply go over to the toolbar and click mark seam or you can find your seam options
By hitting ctrl E and you'll find mark seam and clear seam now that I have my seam selected
I can just double tap a first to deselect and then the second time to select everything and
I'm going to hit U to bring in my unwrapping menu and then choose the default unwrap command if we now for one
You can see that we've now added a UV map over here underneath the object data buttons
And if we switch over to our UV editing layout
Which is simply a UV image editor and a 3d view you can see we have a very nice clean unwrap with no hassle
So this is the basics of it
We've got obviously more controls than this
But that's how to get up and going with UV unwrapping in a very very short time
Simply select your edges set your seam from either the toolbar or by pressing ctrl E and then simply hit U and choose
unwrap