Hold down the Shift key, select the last file or folder and release the Shift key. How to Ctrl select?Ĭlick the first file or folder you want to select. How to use the keyboard shortcut Ctrl + R. What does CRTL are do on a PC?Ĭtrl + R, also known as Ctrl + R and Cr, is the most commonly used shortcut for refreshing a page in an Internet browser. Here are some steps you can take to develop effective key management guidelines: Start with your own key system Create a master key system Update your installation Disable new keys. This is especially important for locking systems with a large number of users. Which is the best definition of key control? Key management refers to various methods of ensuring that certain keys are used only by authorized persons.