电脑f5 f6使用不了是为什么

F5 key on your computer can be different depending on the specific computer or keyboard you have. However, if you are referring to the key on the left side of the F5 key on the top of the keyboard, it typically corresponds to the \"Delete\" key.
When you press the F5 key and then press the \"Delete\" key, you will typically enter a text delete key mode, where you can delete characters by simply pressing and holding down the key. This is useful for delete words, characters, or even entire phrases. You can also use the delete key combination to enter a specific word or character into the document you are working on.
It's worth noting that on some computers and keyboards, the F5 key may also have other functions such as \"Go to the beginning of the line\" or \"Go to the end of the line\" keys. These functions can vary depending on the specific keyboard or computer you are using.