Hi @Adam_Spector,
Welcome ya helwa Airtable Community! :slightly_smiling_face:
You cannot add new options to the Multiple Select Field from the Form (unless you use a 3rd party tool like MiniExtensions which for this particular use is a bit complicated I think).
This option is basically so that users can choose from the field and submit this field (using the options that are already there) via the form. This is used mainly when you have edit permissions in this field which means that not anyone can edit the field, but when you click on this option you allow the form to “edit it” by actually choosing a value for it (again, from the values pre defined).
A work around comes to mind though. You can make a field in the Multi Select called Other(s), then have a Single Line Text field (or any other field type, depending on what the options actually are) that conditionally appears if they choose this option where they can enter their own value in a single line text box. Then if you want to, use Zapier to add this option automatically once a new record is created adding it to the Multi Select values.
If this helps you, please mark it as Solution so others can see it.
BR,
Mo
Thanks for mentioning our tools @Mohamed_Swellam!
We have built an extension specifically for this problem. It’s actually pretty straight forward to setup.