How to slow down the mouse in KDE 4
This page explains step-by-step how to adjust the mouse speed in KDE 4 for Linux. Many people have difficulty using a mouse because of the speed the pointer travels on the screen when the mouse is moved. This speed can easily be reduced to make the mouse more manageable.
Step 1: Open the 'Mouse 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 'Keyboard & Mouse', or press Tab to enter the main part of the window, then use the arrow keys to highlight 'Keyboard & Mouse' and press Enter.
In the 'Keyboard & Mouse' window, click on 'Mouse', or press Tab until the pane on the left of the window is highlighted, then use the down arrow key to move to 'Mouse', as shown in Fig 3.
Click on the 'Advanced' tab, or press Alt + E (on some versions of KDE you may need to press Alt + D instead), to display the window shown in Fig 4.
Step 2: Adjust the mouse pointer speed
Click on the up and down arrow buttons next to the box beside 'Pointer acceleration' to change the speed of the mouse pointer. The standard value is 2.0. Alternatively, press Tab to highlight the 'Pointer acceleration' box, then use the down and up arrow keys to reduce or increase the speed of the mouse.
In the same manner, you can reduce the sensitivity of the mouse by increasing the value in the 'Pointer threshold' box.
Click on the 'Apply' button or press Alt + A to save your changes.
Click on the 'Overview' button or press Esc to return to the 'System Settings' window. Click the 'Close' cross or press Alt + F4 to return to the KDE desktop.