With the latest update, you can now add columns to your tables through the portal. To add a column to an existing table:
- Select your mobile service, and navigate to the data tab
- Select one of your tables and go to the columns tab
- You will have a new button "Add Column" in your toolbar that will let you specify the name and type of column you would like to add.
For now you can only add string, date, number, or boolean columns. These are the same types that you would get when using the dynamic schema option.