The action assigned to shortcut keys can be different in different applications. In the case of Microsoft Excel, Ctrl+1 is a useful shortcut to the format dialog, where you can assign cell formats, borders, etc.
Ctrl + 1
It saves the file.
it is used to make a new slide
ctrl an plus zoom the screen in an ctrl minus dezooms it
It means that you press the Ctrl key and holding it down, press the F1 key to perform a certain function on a personal computer and the function you perform depends on the context and the program running etc.
It lets you format the cell
It is because Ctrl+P is reserved for print. The use of Ctrl+V may be to make sure that the undo, cut, copy and pate function keys are adjacent to each other.
The function of <Ctrl>D is to indicate "End of Transmission". It is the ASCII EOT code. Some run-time libraries and unix shells can use it when reading from standard input to signal the end of the message.
ctrl shift - reverses the effect of ctrl shift =
ctrl plus r reloads a webpage.
CTRL + 1 = First Tab Change the 1 with whatever other tab, and it switches to that tab.
It makes what is on the screen bigger. Another way to do it is ctrl + plus or ctrl + scroll wheel up/down.