# Block

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