# Capabilities and limitations

<table><thead><tr><th width="211">Topic</th><th>How it works</th></tr></thead><tbody><tr><td><strong>Copy &#x26; pasting</strong></td><td>You can't copy and paste flow actions.</td></tr><tr><td><strong>Maximum number of flow actions</strong></td><td>Each flow can have up to 400 actions.</td></tr><tr><td><strong>Test data</strong></td><td>To use the variables generated at the trigger for the subsequent flow steps, you must first test the flow to ensure the payload populates correctly.</td></tr><tr><td><strong>Test data and WhatsApp's customer care window</strong></td><td>For WhatsApp, due to the <a href="/pages/X8CNueLxlxS4YYyhVpCN">24-hour customer care window</a>, you need data less than 24 hours old to test your flow. If you encounter issues while testing, re-populate the test data from the trigger.</td></tr><tr><td><strong>Triggers</strong></td><td>Each flow can be triggered by only one channel instance at a time.</td></tr></tbody></table>


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