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For example , if you use buttons as navigational tools , then want to add an additional navigational button , you will need to create a new graphic . But if you want the adrenaline rush of the latest games , or use your PC - and the Net - to the full as a multimedia tool , then the only question is when to upgrade . Beginning with an overview of relevant search tools , then covering key business information areas such as Government , market research and company sources , and how to exploit the Invisible Web . He plans to continue to advance the tools , then move the company 's offerings toward training and support . First the humans developed fish catching and carving tools , then rafts , dug-out canoes and paddles and then sailing outrigger canoes . If it were not a useful tool , then the cane could never have achieved broad acceptance among the blind . To draw lines , use the freehand line selection tool , then Edit / Draw or <control> - d. To change the color of the drawing , click on the color selection tool , and then click on the desired color in an image , or double click on the tool , and select the color . If the client is to fire ISYS-level events , the wrapper must intercept in some way the GUI ( graphical user interface ) events in the existing tool , then create and broadcast corresponding ISYS events .