ComfyUI Text Line Selector Node
The Line Selector Node allows you to process multiline text one line at a time, with intelligent control over how the line index advances after each generation. This is particularly useful for:
- Batch processing multiple prompts
- Cycling through different parameters or settings
- Processing lists of data entries sequentially or randomly
- Creating dynamic workflows that iterate through text-based inputs
Inputs
| Parameter | Type | Description |
|---|---|---|
| multiline_text | STRING (multiline) | The input text containing multiple lines |
| line_index | INT | Line number to extract (1 = first line, 2 = second line, etc.) |
| control_after_generate | SELECTION | How to modify the index after generation |
Control After Generate Options:
- fixed: Keep the same line index (no change)
- increment: Move to the next line (wraps to first line after the last)
- decrement: Move to the previous line (wraps to last line before the first)
- randomize: Select a random line (avoids repeating the current line when possible)
Outputs
| Output | Type | Description |
|---|---|---|
| selected_line | STRING | The extracted line of text |
| index | INT | The line index used |
Installation
-
Copy the entire folder to your ComfyUI custom nodes directory:
ComfyUI/custom_nodes/line_selector_node/ -
Restart ComfyUI to load the new node
-
The node will appear in the utils category in ComfyUI's node browser as "Text Line Selector"
Important Usage Notes
The control_after_generate functionality is only triggered once per batch.
Due to the way ComfyUI caches node execution results within a batch, this means that all batch items will use the same line.
- ✅ Correct: Set Batch Count to 1, click "Run" multiple times to progress through lines
- ❌ Incorrect: Set Batch Count > 1 expecting different lines per batch item