2 Make calculations. To use more complex calculatorfunctions, open the menu, and select Scientific.3 To clear the display, open the Calculator menu, andselect Clear till roll.Manage certificatesCertificates are used when creating secure connections in, forexample, web browser and mail. You can install, view, anddelete certificates.Certificates are used to authenticate the server or the user.Do not add new certificates unless you have verified that theyare genuine. Adding arbitrary certificates may decrease thesecurity of your encrypted connections.User certificates are typically provided to you by your serviceprovider or company IT department.Select > Settings and Certificate manager.Draw sketchesSelect > Sketch.To draw simple images, start drawing on the screen with yourfinger or with the stylus. All sketches are saved in the PNG fileformat.Open the Sketch menu, and select from the following:New — Start a new sketch.Open — Open an existing sketch.Save — Save a sketch.Canvas size — Modify the canvas size.Crop — Crop a sketch.Details — View details of a sketch.Drawing toolsSelect from the following:— Draw freehand.— Draw straight lines.— Draw a rectangle.— Draw an ellipse or a circle.— Erase a line or shape. Select one of the four brush sizesfrom the toolbar, and draw over the area you want to erase.To change the brush size or colour, select the respectiveselector icon from the toolbar.Open X TerminalX Terminal is an advanced application, with which you canuse your device through a command line interface.Select > X Terminal.112 Use utilities and manage data© 2010 Nokia. All rights reserved.