In my Chrome browser Ctrl + j shows the download history.
Each application can have a different behavior when the Ctrl and another key are pressed.
For example in Visual Studio 2008 Ctrl + j invokes statement completion.
There is also a game called Ctrl-J
Ctrl plus J is used to justify text or a paragraph.
ctrl an plus zoom the screen in an ctrl minus dezooms it
ctrl shift - reverses the effect of ctrl shift =
ctrl plus r reloads a webpage.
Ctrl + 1
It makes what is on the screen bigger. Another way to do it is ctrl + plus or ctrl + scroll wheel up/down.
It increases the magnification of the screen. CTRL plus _ does the reverse.
Ctrl plus N opens a new window in a browser.
nothing
Try control plus V
Ctrl+L align left,Ctrl+E center,Ctrl+R aling right and Ctrl+J justify
It zooms in on the page.