Insert Mode

Certain commands only do things while in insert mode. A list of insert mode mappings in vanilla vim can be found here. A list of V-specific mappings can be found here:

Name	Mnemonic	Description
¬{char1}{char2}	<M-,>	Insert every character in the range [char1 - char2]. For example, ¬az will insert the lowercase alphabet, and ¬<space>} will insert all of printable ASCII.

#Repchar

One of the best insert commands is "repchar". The mnemonics are <M-1>, <M-2>, <M-3>... and they make n copies of the next character to be typed. For example, typing <M-5>a in insert will insert the letter 'a' 5 times.

These also work with two digit numbers, so for example, <M-1><M-2>a would insert 12 'a's. They can also be called from normal mode.

Since it never makes sense to call <M-1>a (since a is shorter) this will special case to inserting 10 'a's. Taking advantage of this can save one byte when you want 10 of a character.