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

1. Copy the entire folder to your ComfyUI custom nodes directory:

   ComfyUI/custom_nodes/line_selector_node/
   

2. Restart ComfyUI to load the new node

3. 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