Blocks are the building units of your content. The most basic is the text block — write your content and use the slash (/) command to add other block types.

Currently available:

• Text block (default)
• Image block
• Table block
• Code block

Coming soon:

• AI Diagram block — create diagrams with AI assistance
• Shape block — draw and insert shapes

Merging Blocks

Scattered Blocks on the canvas can be merged into one. Select two or more Blocks and click the merge blocks popup (or use ⌘ + Enter, or Ctrl + Enter on Windows).

This is helpful for organizing scattered ideas. Spread thoughts first, then group related content to form meaningful sections.

Splitting blocks

On canvas, a Block being edited can be split into two separate Blocks—whether it's a standalone Block or content inside a Shell. Use Command + Enter (or Ctrl + Enter on Windows) to divide at the cursor position.

This is useful when a new idea emerges while writing: split it into a separate Block, then merge or reorganize later as thinking evolves.

Text Block

The text block is the default block in Arky. Start typing anywhere on the canvas to create one, and use the slash (/) command to switch or insert other block types.

Writing

Every block on the canvas is independent. Press Enter to create a new block below, or use the slash command to change the current block's type.

Inline Formatting

Inside any text block, you can apply inline formatting to enrich your content.

Available formatting

• Bold — ⌘B (or Ctrl+B on Windows)
• Italic — ⌘I (or Ctrl+I on Windows)
• Inline code — ⌘E (or Ctrl+E on Windows)
• Strikethrough
• Subscript — e.g. H₂O, chemical formulas, footnote markers
• Superscript — e.g. x², citations, ordinal indicators (1ˢᵗ, 2ⁿᵈ)

How to apply subscript / superscript

Select the text you want to format, then open the formatting toolbar that appears above the selection. Click the X₂ button for subscript or the X² button for superscript.

You can also use the slash (/) command and search for "subscript" or "superscript" to wrap selected text.

Typical use cases:

• Scientific notation: H₂O, CO₂, E = mc²
• Math expressions: x² + y² = r²
• Footnote markers: reference¹, note²
• Ordinal numbers: 1ˢᵗ place, 3ʳᵈ edition