Elements of use case diagram: Actor. â¢ Actor is someone interacting with use case. (system function). Named by noun. â¢ Similar to the concept of user, but. a user can play different roles; (example: a prof. can be instructor and. researcher â plays 2 roles with two systems). â¢ Actor triggers use case. â¢ Actor has responsibility toward the system (inputs), and Actor have expectations from the system (outputs).
Related Manuals for Lenovo Laptop. Summary of Contents for Lenovo Laptop. Page 1: User Guide Lenovo User Guide Read the safety notices and important tips in the included manuals before using your computer. Page 2 Notes â¢ Before using the product, be sure to read Lenovo Safety and General Information Guide first.
How to Unlock a Laptop Mouse. ... Like most modern laptops, IBM/Lenovo laptops feature a built-in touchpad that you can use as... 1  How to Unlock a Laptop Touch Pad.lick the Lenovo Touchpad in the Devices list and click the Enable button to activate the Touchpad. Click the OK button to save your changes. Your Lenovo's touchpad is unlocked and ready for use.