Field Configuration: To add Multi Select field in a form, go to User Meta >> Forms. Add a new form or edit an existing one. In the Form Builder menu click Multi Select from right sidebar of Extra Fields section. Then you will have a configuration panel. Configure your Multi Select field by using this configuration panel.
This part consists of Field Label, Label Position, Description, Meta Key, Default Value, Field’s Options, Requirement of the field and Line Break.
Field Label: Set the field’s name whatever you want.
Label Position: Set where the name of the field will be visible. There are several options.
You can place it at Top, Left, Right, Inline or Placeholder. You can even hide the name by
selecting the option Hidden.
Description: Write the description of the field, if you want. Description will be visible
under the field box.
Meta Key: Use meta key to save field’s data. Without defining the meta key, field data won’t be saved.This is unique identification key for field. E.g. language (unique and no space).
Options & Advanced mode: Write down the options for the multi select field. ‘L’ is for label of the option. Add more options with ‘+‘ button and to delete existing option use ‘–‘. Value for a specific option will be the same as the label unless Advanced mode is activated and different value is written.
Can set a default value by clicking the circle (beside your preferred option) so the field will have the value even if it is ignored.
In Advanced mode you can classify options by different groups. Create groups by naming them and place them with drag and drop procedure. Activate these options by checking Advanced mode.
Required: Check Required if you want the field must to be filled.
This part consists of Rules, Field Size, Input Class, Field Container Class, Field Container Style, Make the Field as Shared and Conditional Logic.
Rules: You can set the field only for the admin by checking Admin Only. Also can select Read-Only for all user or Read-Only for non admin.
Field Size: Set the size of the field. For example: to make a 200px field just write 200px; in the box.
Input Class: Can specify custom class for input. Write the custom class name.
Field Container Class: Can set custom class for field container. Write the custom class name.
Field Container Style: Can set custom css style for field container.
Make Field as Shared: To make this field as a shared field to use the field in any form just check Make this field as shared.
Conditional Logic: To apply conditional logic to this field Enable Conditional Logic. To know about conditional logic, read Fields Basics.
For these configurations, generated multi select field will be like below.