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Use a preset Subject field for Events and Tasks in Salesforce1

Knowledge Article Number 000193266
Events and Tasks use a built-in Subject field, which is listed as a picklist or combo box, and is not supported in Salesforce1. However, your Users can still choose from a preset Subject field list by using a Workflow Rule. Review the set-up steps below. 

Note: This setup only applies to Salesforce1 and is not supported in the Salesforce Classic app or Salesforce full site.
Workflow Rules are available in: Enterprise, Performance, Unlimited, Developer, and Editions - Standard Objects are not available in

Create a new Custom Picklist Field for Events and/or Tasks

  1. From Setup, go to Customize > Activities > Activity Custom Fields. 
  2. Create a Custom Picklist called “Event Subject".
  3. Populate the picklist with the preset phrases you want to use for the "Subject" field.

Note: No need to add this new field to existing Page Layouts.

Add the new Custom Picklist to the Publisher Action Layout

  1. From Setup, go to Create > Global Actions > Actions.
  2. Next to the “New Event” action, click Layout.
  3. Remove the existing "Subject" field from the layout and replace it with your new “Event Subject” field.
Once this is saved you can check the "Publisher Action" button on your device and see your new picklist.

Build a Workflow Rule

To copy the value from our Custom Picklist to the built-in Subject field:

     1. From Setup, go to Create > Workflow & Approvals > Workflow Rules.
     2. Create a new Rule:

Step 1: Object = Event
Step 2: Rule Name = Copy Event Subject
Evaluate the rule when a record is = Created
Run this rule if the following = criteria are met
Field = Event: Subject
Operator = equals
Value = (leave this area blank)
Step 3: Add Workflow Action “New Field Update”
Name = CopyEventSubject
Field to Update = Standard field: Subject
Use a formula to set the new value
Formula Value (Text) = TEXT ( Event_Subject__c  )
Note: the value inside the parentheses is the API name of your custom picklist
  1. Click Activate at the top of the Workflow Rule detail page.

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