Multi-Key

FREE online courses on How to Use Keyboard Shortcuts -  

A multi-key shortcut would be when you press and hold a key, like the CTRL (Control) key and then tap another key, like the letter C. 

This is shown as CTRL + C (pronounced Control C), you don't hit the plus key, it's just showing you which keys to press in combination. 

Make sure you always press and hold the first key (usually ALT (Alternate), CTRL or SHIFT) and then while still holding it, just tap the next key.