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+import VTSequence from "@/components/VTSequence";
+
+# Insert Line (IL)
+
+<VTSequence sequence={["CSI", "Pn", "L"]} />
+
+Inserts `n` lines at the current cursor position and shifts existing
+lines down.
+
+The parameter `n` must be an integer greater than or equal to 1. If `n` is less than
+or equal to 0, adjust `n` to be 1. If `n` is omitted, `n` defaults to 1.
+
+If the current cursor position is outside of the current scroll region,
+this sequence does nothing. The cursor is outside of the current scroll
+region if it is above the [top margin](#TODO), below the [bottom margin](#TODO),
+left of the [left margin](#TODO), or right of the [right margin](#TODO).
+
+This sequence unsets the pending wrap state.
+
+This sequence moves the cursor column to the left margin.
+
+From the current cursor row down `n` lines, insert blank lines colored
+with a background color according to the current SGR state. When a line is
+inserted, shift all existing content down one line. The bottommost row
+is the bottom margin. If content is shifted beyond the bottom margin,
+it is lost and the existing content beyond the bottom margin is preserved
+and not shifted.
+
+If a [left margin](#TODO) or [right margin](#TODO) is set, only the cells
+within and including the margins are blanked (when inserted) or shifted.
+Other existing contents to the left of the left margin or right of the
+right margin remains untouched.
+
+If a multi-cell character would be split, erase the full multi-cell
+character. For example, if "橋" is printed to the left of the left margin
+and shifting the line down as a result of IL would split the character,
+the cell should be erased.
+
+## Validation
+
+### IL V-1: Simple Insert Line
+
+```bash
+printf "\033[1;1H" # move to top-left
+printf "\033[0J" # clear screen
+printf "ABC\n"
+printf "DEF\n"
+printf "GHI\n"
+printf "\033[2;2H"
+printf "\033[L"
+```
+
+```
+|ABC_____|
+|c_______|
+|DEF_____|
+|GHI_____|
+```
+
+### IL V-2: Cursor Outside of Scroll Region
+
+```bash
+printf "\033[1;1H" # move to top-left
+printf "\033[0J" # clear screen
+printf "ABC\n"
+printf "DEF\n"
+printf "GHI\n"
+printf "\033[3;4r" # scroll region top/bottom
+printf "\033[2;2H"
+printf "\033[L"
+```
+
+```
+|ABC_____|
+|DEF_____|
+|GHI_____|
+```
+
+### IL V-3: Top/Bottom Scroll Regions
+
+```bash
+printf "\033[1;1H" # move to top-left
+printf "\033[0J" # clear screen
+printf "ABC\n"
+printf "DEF\n"
+printf "GHI\n"
+printf "123\n"
+printf "\033[1;3r" # scroll region top/bottom
+printf "\033[2;2H"
+printf "\033[L"
+```
+
+```
+|ABC_____|
+|_c______|
+|DEF_____|
+|123_____|
+```
+
+### IL V-4: Left/Right Scroll Regions
+
+```bash
+printf "\033[1;1H" # move to top-left
+printf "\033[0J" # clear screen
+printf "ABC123\n"
+printf "DEF456\n"
+printf "GHI789\n"
+printf "\033[?69h" # enable left/right margins
+printf "\033[2;4s" # scroll region left/right
+printf "\033[2;2H"
+printf "\033[L"
+```
+
+```
+|ABC123__|
+|Dc__56__|
+|GEF489__|
+|_HI7____|
+```