<C-o> (in insert mode)
Pressing while in insert mode drops you into a special "insert-normal" mode where you can execute exactly one normal mode command, then immediately return to in
<C-v>$A
When you need to append text to the end of several lines that have different lengths, visual block mode with $ is the key.
<C-o>{command}
While typing in insert mode, you sometimes need to do a quick normal-mode action — center the screen, jump to a mark, or delete a word backward.
<C-v>jj$A;
Visual block mode normally selects a fixed-width column, which makes appending tricky when lines have different lengths.
<C-r><C-r>a
In insert mode, a pastes register a but processes the text as if typed, which can trigger abbreviations and mappings.
<C-r>=2+2<CR>
The expression register (=) in insert mode lets you evaluate any Vimscript expression and insert the result inline.
<C-r>=system("date")<CR>
The expression register (=) is one of Vim's most powerful yet underused features.
<C-r><C-o>{register}
The standard {reg} pastes register contents in Insert mode, but Vim may auto-indent multi-line text to match the current indentation level — sometimes manglin
<C-r>0
In Insert mode, {reg} pastes the contents of any register inline at the cursor.
<C-g>u
By default, Vim treats an entire Insert mode session (from entering Insert mode to pressing ) as a single undo unit.
<C-t> / <C-d>
While in Insert mode, you can adjust indentation without switching back to Normal mode.
<C-r>a
In insert mode, press followed by the register name.
auto-pairs plugin
auto-pairs automatically inserts closing brackets, parentheses, and quotes when you type the opening one.
<C-v>u{code} in insert mode
In insert mode, u followed by a 4-digit hex code inserts the Unicode character at that code point.
<C-v>jj$A
Combining visual block mode with $ and A lets you append text at the end of multiple lines, even when the lines have different lengths.
:iabbrev {abbr} {expansion}
How it works The :iabbrev command creates abbreviations that automatically expand when you type them in insert mode.
:iabbrev teh the
Vim's abbreviation feature lets you define automatic text replacements that trigger as you type.
qa<C-r>=expression<CR>q
How it works The expression register (=) lets you evaluate Vimscript expressions and insert the result.
qabi"<Esc>ea"<Esc>wq
How it works This macro wraps the current word in double quotes and moves to the next word, making it easy to repeat across a line or file.
<C-v>u{code}
In insert mode, followed by u and a 4-digit hex code inserts the Unicode character with that code point.
