How to change your fonts in KDE 4
This page explains step-by-step how to change the system fonts used by KDE 4 for menus, toolbars, titles and other text.
Step 1: Open the 'Font settings' window
Click on the 'K' icon on the menu bar, or press Alt + F1, to open 'Kickoff' as shown in Fig 1.
Click on 'Computer' and then 'System Settings', or use the arrow keys to select these and then press Enter, to open the 'System Settings' window shown in Fig 2.
(Some setups may vary. In this example, 'System Settings' is also available from the 'Favourites' tab, as shown in Fig 1.)
Click on the 'Appearance' icon, or press Tab to enter the main window, and then use the arrow keys to navigate to 'Appearance' and then press Enter.
In the window that opens, shown in Fig 3, click on the 'Fonts' icon, or press Tab until the pane on the left is highlighted, then use the down arrow key to move to 'Fonts'.
Step 2: Change your fonts
Click on the 'Adjust All Fonts' button or press Alt + J to open the 'Select Font' window shown in Fig 4.
Click the checkbox next to 'Font' or press Alt + F. Click on the font you want from the list under 'Font', or press Tab until any of the fonts in the list is highlighted and then use the up and down arrow keys to highlight the font you want.
Click the checkbox next to 'Size', then click on the font size you want from the list below. Alternatively, press Alt + S and type the font size you want in the box, or press Tab until any of the font sizes in the list below is highlighted and then use the up and down arrow keys to highlight the font size you want.
When you are happy with your choices, click the 'OK' button or press Alt + O to return to the 'Font Settings' window (Fig 3). If you wish, you can change the font for individual features such as window titles by repeating the steps above.
When you are finished choosing all of your fonts, click on the 'Apply' button or press Alt + P (it may be Alt + A in some versions of KDE) to make your changes take effect.
Click on the 'Overview' button or press Esc to return to the previous screen. Click the 'Close' cross or press Alt + F4 to return to the KDE desktop.
Note: If this does not work it could be because your computer settings cannot be changed due to local IT policies - contact your local IT support for further help.