Introduction

Multiline editing in Visual Studio Code means changing several lines in one operation instead of line by line. It usually combines multiple cursors, box selection, and match-based selection, and it is most valuable when the change is local, visible, and repetitive.

Add A Cursor To Every Selected Line

One of the most useful multiline-editing commands is "add a cursor to the end of each selected line":

• Windows and Linux: Shift+Alt+I
• macOS: Shift+Option+I

Suppose you start with:

alpha
beta
gamma

Select the lines, run the command, and type ,:

alpha,
beta,
gamma,

This is ideal for suffix edits such as commas, semicolons, or trailing comments.

Use Box Selection For Column Edits

Some edits are column-shaped rather than line-shaped. In that case, box selection is the better tool because it creates a rectangular selection at the same horizontal position across several lines.

For example:

id:   1
id:   2
id:   3

You can box-select the numeric column and type once to edit every line together. This is much cleaner than trying to place ordinary cursors by hand.

Match-Based Multiline Editing

If the same text appears repeatedly, you can build a multi-selection from matches:

• 'Ctrl+D on Windows and Linux, Cmd+D on macOS: add the next match'
• 'Ctrl+Shift+L on Windows and Linux, Cmd+Shift+L on macOS: select all matches'

For instance, if several nearby lines contain the word temp, select one occurrence and press the shortcut until the intended matches are active. Then type once to replace all of them.

This is excellent for local textual cleanup. It is not the best choice for semantic symbol renames, because it cannot distinguish between code, comments, and string literals the way language-aware refactoring can.

Prefixes, Wrappers, And Structured Text

Multiline editing shines when you need to wrap several lines with punctuation or repeated structure. Consider this list:

apple
banana
carrot

If you need:

"apple",
"banana",
"carrot",

One clean workflow is:

1. select the lines
2. add cursors to line ends and type ",
3. use box selection at the line starts and type "

That is a small example, but it reflects the real value of multiline editing: many tiny, controlled changes without copy-paste drift.

Skip The Matches You Do Not Want

Sometimes Ctrl+D or Cmd+D selects a match you do not want. VS Code lets you skip the current match and move on:

• Windows and Linux: Ctrl+K, then Ctrl+D
• macOS: Cmd+K, then Cmd+D

That is especially useful when a word appears mostly in the right context but one occurrence is in a comment or unrelated string.

When To Use Multiline Editing Instead Of Replace

Search-and-replace is best when the rule is uniform and broad. Multiline editing is better when:

• the target region is local
• you want to see every edit point before typing
• the transformation is simple but not uniform enough for a safe replace

A useful rule of thumb is:

• multiline editing for visible, local transformations
• search-and-replace for broad textual patterns
• rename refactor for language-aware symbol changes

That division keeps your edits fast without making them fragile.

Common Pitfalls

• Using multiline editing for semantic renames that should use the refactor engine.
• Not noticing that one unwanted match is included in a multi-selection.
• Forgetting box selection when the problem is really column alignment.
• Reaching for search-and-replace when the target is a small visible block.
• Creating so many cursors that it becomes hard to predict the result.

Summary

• Multiline editing combines multiple cursors, box selection, and match-based selection.
• Use line-end cursors for suffix edits on several lines.
• Use box selection for aligned or column-based text.
• Use match-based selection for local repeated text changes.
• Prefer multiline editing when you want visible, controlled edits in a local region.