how to associate a specific function to the graphics tablet's pen in photoshop elements?

[Valentina ♡]

Hello, 
I have a question about how to associate a specific function to the pen while I use photoshop elements?

For example when I click the button on the pen, I wish I can regolate the size of the brush so that I can quickly switch from a size to another....

At the moment, when I click the button on the pen, Photoshop open the panel ' brushes', not the size of brushes ...thank you for the help!

[Valentina ♡]

Oh, I realized also that , if I also click with second key of mouse, it pop up the same windows with the brushes...
I wonder, there's a way to associated to the second key of mouse a function? So that, when I click the button of the pen of my tablet, it should do the same that the mouse do. .. 

[Jeff Arola]

There should be some kind settings program that came with your tablet where you can assign a button to do a right click.

What make and model graphics tablet do you have?

[Valentina ♡]

I own a wacom cth-461 pen tablet, it's old but still good for what I need it. 
The problem is not to find the setting, at least, it was easy, to find wacom setting for the pen. I can select the click operations, but of course the wacom pen don't controls the photoshop 's menu...

What I'm trying to figure out, is  , why, if I click with the second button of mouse on photoshop, it open the panel of brushes, I mean, it's a defoult assigned operation, or, there's a way to say to photoshop to assign something else to the right click of mouse when I select the brush from the tool panel?
If I could change the right click for photoshop and associate the dimension of the brush, I'm sure that I could change also the pen operation, because the click on the pen , match the second button of the mouse when Brush is selected.