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