Lenovo ThinkPad T420si (English) User Guide - Page 54

5. Click OK or Apply. 6. If your computer is a Windows 7 model, click Show hidden icons in the task bar. The UltraNav icon is displayed. To add it to the task bar permanently, click Customize and proceed to customize the settings. You can now change the properties of UltraNav by clicking the UltraNav icon on the system tray. Touch panel Some models have the touch panel feature. This feature makes interaction with your computer even more natural, because you can use fingers instead of a pen for navigation on the go. For a single click, tap the display once with your finger. For a double click, tap the display twice without pausing. For a right click, tap the display once and then hold your finger on the display until a circular symbol appears. When you take your finger off the display, the right-click menu will open. Using the multitouch panel On a model that has the multitouch panel feature, the touch panel supports multitouch, with which you can zoom in, zoom out, scroll, or rotate on the screen with your two fingers while browsing the Internet or reading or editing a document. The multitouch panel supports the capacitive touch. Even the slightest contact of your electron-rich finger with the screen's glass is enough to activate the capacitive sensing system. This function does not work with inanimate objects, fingernails, gloved fingers. Advanced palm-rejection technology helps to prevent inadvertent contact with a finger, which could disrupt finger input. Tips on using the touch panel Following are some tips on using the touch panel: • The touch panel is a glass panel covered with a plastic film. Do not use any pen or any metallic object, because to do so might damage the touch panel or cause it to malfunction. • With the touch panel, gradually a discrepancy may start to appear between the point you touch with your finger (or two fingers) during the finger point, and its actual position on the screen. To avoid this, regularly correct the accuracy of the finger input by use of the touch panel Settings Utility. • The touch panel of your computer supports multitouch with which you can: - Pinch two fingers together or apart to zoom in or out on a document. - Scroll window contents by moving two fingers up and down, left and right. - Touch two points on a digital photo and twist to rotate it just like a real photo. Cleaning the touch panel display To clean the touch panel display, do the following: 1. To remove fingerprints, etc., from the touch panel display, use a dry, soft, lint-free cloth or a piece of absorbent cotton. Do not apply solvents to the cloth. 2. Gently wipe foreign particles and dust from the touch panel with one side of the cloth. 3. Wipe smudges or fingerprints with the other side of the cloth, or with a clean cloth. 4. After using the cloth, wash it with a neutral detergent. Power management When you need to use your computer away from electrical outlets, you depend on battery power to keep your computer running. Different computer components consume power at different rates. The more you use the power-intensive components, the faster you consume battery power. 38 User Guide