# Add & Replace Columns in Your Dataset Source: https://docs.caplena.com/data-project-management/adding-replacing-data/add-replace-columns-in-your-dataset Use Add & Replace to update specific rows or columns in your dataset The **Add** & **Replace** function allows you to update existing rows in your Caplena dataset using a new file upload, without losing any manual coding or topic assignments. This is especially helpful when refreshing or correcting your data while preserving previous work. ## When Should You Use "Replace Columns"? The **Replace Rows** feature is ideal in the following scenarios: ### 1. You want to add a new column (Both TTA and Non-TTA) *(TTA = Text to Analyze)* Example: Add a demographic variable, metadata field, or custom tag that wasn't included in the original dataset. **Use case:** Add new columns without re-uploading everything from scratch. ### 2. You want to update values in a TTA column If you've corrected or enriched your open-ended responses: **Use case:** Replace rows while preserving existing coding or AI analysis. ### 3. You want to update values in a non-TTA column Example: Fixing or completing metadata like **Gender**, **Age**, or **Brand**. **Use case:** Update values without re-uploading the whole dataset. ## How to use Replace Rows