Sign UI Prompt
Use s: to collect text through a Sign editor.
/gamemode <s:What gamemode?>Inline display text is split on {br} and placed around writable rows according to SignUI.Input-Field-Location:
bottom(default): Prompt text occupies lines 1–3 and player input is captured on line 4.top: Input is captured on line 1 and prompt text occupies lines 2–4.bottom-aggregate: Prompt lines are placed at the top and all remaining bottom lines are aggregated (concatenated with spaces) into the final argument.top-aggregate: Prompt lines are placed at the bottom and all remaining top lines are aggregated (concatenated with spaces) into the final argument.
In normal mode, single line modes (top, bottom) take the designated input line, while aggregate modes concatenate all non-prompt input lines with spaces.

Labeled multi-argument mode
Multi-argument mode activates only when at least one {br} segment is exactly a non-space label followed by a colon, such as Mode: or Value:. On submission, each row matching label:anything contributes only the text after its first colon.
If the player edits the labeled rows to Mode:add and Value:1600, the answer is add 1600.

Labels containing spaces, or a segment that already has text after its colon, do not activate multi-argument mode. Sign answers always have color codes stripped. An empty result, the cancel keyword, or closing/cancelling the screen cancels the session.
Sign prompts use version-specific providers for Minecraft 26.1.2 and 26.2.x and fall back to Chat if no compatible provider opens.
See Sign UI settings.
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