Why are "Insert" and "Scroll Lock" installed? How to use "unnecessary keys" on the keyboard
A standard PC keyboard has over 100 keys. With so many keys, even people who use them every day at work have "keys that don't know what they are useful for." I'm sure you're familiar with something like "Scroll Lock" or "Pause/Break."
This time, we will introduce the functions of such "unnecessary keys" of the keyboard.使い方を頭に入れておくと意外と便利……かもしれません。
What are the keys in the red circle useful for? situation. In "overwrite input" mode, existing characters are overwritten when characters are entered from the middle of a sentence. The Insert key allows you to switch between these modes.Overwrite mode saves you the trouble of erasing old input content, but if the new input content and the number of characters do not match, it will remain half-finished like “Please. Difficult to do. If the number of characters does not change before and after rewriting, for example, it is convenient to use it for rewriting postal codes.
Originally, it was used to suspend programs, and even now it can be used to suspend the BIOS. However, because it is used too infrequently, it is clearly stated on Microsoft's website that "this key is rarely used."
There are very few software that support Scroll Lock, and there should be almost no opportunity to use it. For the time being, in "Excel", it can be used to switch between "moving the selected cell/moving the screen when the cursor key is operated".
However, if you use both the cursor keys and the mouse, you can achieve the same operation, so it may not be too much of a problem without Scroll Lock.
When I searched for "Scroll Lock" on Microsoft's support page, the method for disabling this function was at the top. Won 1st place in the "Unknown Windows Key" ranking. It's certainly not very useful in Windows, but in Linux it can be used in combination with other keys to reboot the system, display memory information, etc. It can be used in scenes such as debugging kernel development and restarting when it freezes.SysRq stands for "System Request". Originally used for system requests.
"Magic SysRq key (command using SysRq key)" that can be used in Linux distributions such as Ubuntu (from website)Some keyboards have " Three keys: Wake Up, Sleep, and Power. The Sleep key can be used to transition to sleep state, and the Wake Up key can be used to return from there.
Also, you can shut down your PC by pressing the Power key, but if your hand slips and you accidentally press it while working, the data before saving will disappear, so it is called a "self-destruct switch" or "self-destruct button". and.
These keys get a sad treatment, not even on compact keyboards like those found on laptops. Obviously, it is a natural response because it is used less frequently than other keys.
However, if you look at the manufacturer's support page, you may find an alternative input method using keyboard shortcuts. Just like that person you don't like has family and friends, maybe there is someone out there who needs an "unnecessary key" for you.
