I cannot change the font size of package explorer in Eclipse

Question

I try to change the font size of package explorer in Eclipse from menu Window → Preferences → General → Appearance, and I fail to change

Answer 1

In Eclipse 4.7.x the CSS files are under eclipse⁩/⁨plugins⁩/⁨org.eclipse.ui.themes_1.2.1.v20170809-1435⁩/⁨css⁩/

In my case I use the dark theme for OSX, so I opened the file e4-dark_mac.css and added the font-size line:

CTabFolder Tree, CTabFolder Canvas {
    background-color: #2F2F2F;
    color: #CCC;
    font-size: 13pt; // new 
}

Answer 2

This worked for me:

.MPart Tree{
  font-size: 8;
}

Answer 3

On Ubuntu 14.04 (Trusty Tahr) this was the best choice for me:

.MPart Tree{
  font-size: 10;
}

Answer 4

Thanks to Veger's reply, I successfully changed the font of my PHP Explorer in PHP Perspective (with PDT installed). The following CSS code,

    #org-eclipse-php-ui-explorer Tree {
       font-family: Consolas;
       font-size: 21px;
    }

are added into my "eclipse-4.3\plugins\org.eclipse.platform_4.3.1.v20130911-1000\css\e4_default_win7.css" file.

You may choose a different CSS file, depending on the theme you choose through Preferences → General → Appearance: "Theme" drop-down list).

Answer 5

Eclipse is using native Windows widgets and their settings can only be changed from Display Properties / Settings / Advanced / General properties tab. There you can change your screen DPI to alter font sizes.