Data Preview
The data preview panel at the bottom of the workspace lets you inspect data at any point in your workflow.
Opening the Panel
The bottom panel can be toggled and has three tabs:
- Data Preview: View data from selected tool outputs
- Logs: View execution logs
- Network: View API request/response activity
Previewing Data
Selecting an Output Socket
When a tool is selected, the left sidebar shows available output sockets:
- Select a tool on the canvas
- Click on an output socket tab in the sidebar (e.g.,
output,T,F) - Click "Preview" or wait for automatic preview
Data Table
The preview shows data in a scrollable table:
- Columns: Show column names and inferred types
- Rows: First N rows of the dataset (limited for performance)
- Scrolling: Horizontal and vertical scrolling for large datasets
Limitations
- Preview fetches a limited sample of rows (typically 100-1000)
- Large datasets are not fully loaded into memory
- Some operations may require executing upstream tools first
Socket Tabs
For tools with multiple outputs (like Filter with T/F or Join with L/J/R), tabs let you switch between outputs:
| Tool | Output Tabs |
|---|---|
| Filter | T (matching rows), F (non-matching rows) |
| Join | L (unmatched left), J (matched), R (unmatched right) |
| Other tools | Single output tab |
Resizing the Panel
Drag the top edge of the panel to resize it vertically. The panel remembers your preferred height.
Closing the Panel
Click the × button in the panel header to close it.