Visual mode
You use visual mode to select text in different ways. You can then use different commands to affect the text, for example copy or cut. Use the escape key to go back to normal mode.
v
Start visual mode
Select text character by character. This is similar to standard text selection in other editors.
V
Start line based visual mode
Select text line by line.
Ctrl
+
v
Start block based visual mode
Select text by defining a box.
o
Move to the other end of the selection