How to customize less files in a new created theme?

Hello,

I'm using T3 blank template bs3. created a new theme as you wrote in your documentation.

Now I want to customize the template. By example the padding settings of the t3-maincontent and t3-content. So I'm opening the variables less files in the cloned map and do my customizing.

When I had my editing done I choose for Less to CSS in the backend. But there is nothing changed after that in the website frontend. I did the LESS to CSS with and without "Development mode" enabled. Nothing changed. In your documentation site you said Compile LESS to CSS: After customizing theme, please compile LESS to CSS. The new theme CSS files will be located in templates/t3_bs3_blank/css/themes/dark-copy.

I think that's not good. It must be "....will be located in templates/t3_bs3_blank/local/css/themes/dark-copy.

So can you please told me what I have to do when I changed the less files by hand (editing) and not wit ThemMagic.

Or can you tell me how to customize the right way?

Thanks.