Sublime Text 2 - View whitespace characters

I use Unicode Character Highlighter, can show whitespaces and some other special characters.

Add this by, Package Control

Install packages, unicode ...

If you really only want to see trailing spaces, this ST2 plugin will do the trick: https://github.com/SublimeText/TrailingSpaces

In selected text, Space is shown as a middle dot (·) and Tab as a long dash (—).

To view whitespace the setting is:

// Set to "none" to turn off drawing white space, "selection" to draw only the
// white space within the selection, and "all" to draw all white space
"draw_white_space": "selection",

You can see it if you go into Preferences->Settings Default. If you edit your user settings (Preferences->Settings - User) and add the line as per below, you should get what you want:

{
    "color_scheme": "Packages/Color Scheme - Default/Slush & Poppies.tmTheme",
    "font_size": 10,
    "draw_white_space": "all"
}

Remember the settings are JSON so no trailing commas.