Hi Neil, Thank you for your question, The following documentation confirming what is support when formatting **messageML tables** in Symphony (https://docs.developers.symphony.com/building-bots-on-symphony/messages/overview-of-messageml/messageml-basic-format-tags/tables). There are many similariates with **Symphony messageML** to other markup languages such as **HTML**. However, not all aspects of the markup languages like **HTML** will be compatible with **Symphony messageML**. We would recommend using the **Symphony PresentationML Renderer Tool** as a way to validate the **messageML** you are formatting: https://renderer-tool.app.symphony.com/ If you wanted to format & alter the column width of a table using messageML - you can use either the '**pixel**' count or the '**%**'. Here are two examples showcasing the using the '**pixel**' count & '**%**' tables in **messageML**: ``` <messageML> <table style="width:900px"> <tr> <th style="width:300px"> column 1 </th> <th style="width:400px"> column 2 </th> <th style="width:200px"> column 3 </th> </tr> <tr> <td style="width:300px"> value 1 </td> <td style="width:400px"> value 2 </td> <td style="width:200px"> value 3 </td> </tr> </table> </messageML> ``` ``` <messageML> <table style="width: 100%"> <tr> <th style="width: 10%"> column 1 </th> <th style="width: 20%"> column 2 </th> <th style="width: 70%"> column 3 </th> </tr> <tr> <td style="width: 10%"> value 1 </td> <td style="width: 20%"> value 2 </td> <td style="width: 70%"> value 3 </td> </tr> </table> </messageML> ```

Hi Neil, Thank you for your question, The following documentation confirming what is support when formatting **messageML tables** in Symphony (https://docs.developers.symphony.com/building-bots-on-symphony/messages/overview-of-messageml/messageml-basic-format-tags/tables). There are many similariates with **Symphony messageML** to other markup languages such as **HTML**. However, not all aspects of the markup languages like **HTML** will be compatible with **Symphony messageML**. If you wanted to format & alter the column width of a table using messageML - you can use either the '**pixel**' count or the '**%**'. We would recommend using the **Symphony PresentationML Renderer Tool** as a way to validate the **messageML** you are formatting: https://renderer-tool.app.symphony.com/ Here are two examples showcasing the using the '**pixel**' count & '**%**' tables in **messageML**: ``` <messageML> <table style="width:900px"> <tr> <th style="width:300px"> column 1 </th> <th style="width:400px"> column 2 </th> <th style="width:200px"> column 3 </th> </tr> <tr> <td style="width:300px"> value 1 </td> <td style="width:400px"> value 2 </td> <td style="width:200px"> value 3 </td> </tr> </table> </messageML> ``` ``` <messageML> <table style="width: 100%"> <tr> <th style="width: 10%"> column 1 </th> <th style="width: 20%"> column 2 </th> <th style="width: 70%"> column 3 </th> </tr> <tr> <td style="width: 10%"> value 1 </td> <td style="width: 20%"> value 2 </td> <td style="width: 70%"> value 3 </td> </tr> </table> </messageML> ```