# Custom transform step now supports multiple inputs and locked columns

> <p>The <strong>Custom transform</strong> step just got two big upgrades. Steps can now accept up to 5 input tables, making it easier to work across multiple datasets in a single step. You can also lock output columns in place so that regenerating or editing your logic won't change the structure of your results.</p>

Source: https://parabola.io/updates/custom-transform-step-now-supports-multiple-inputs-and-locked-columns