When you create a task, you can select only one approver.
You can send a task for approval in several ways:
click Approver in the top menu of the task creation page and select a user in the Approver field;
Fig. 1. "Approver" button and field
open the task page, click Actions - Send for Approval (fig. 2) and select a user, approval start and due dates in the opened window (fig. 3) Only the task executor can use this method.
Fig. 2. "Actions – Send for Approval" button
Fig. 3. Select user window
The approver can click Approve or Reject in the toolbar of the task page (fig. 4).
Fig. 4. "Approve" and "Reject" buttons
The Parent Task tab (fig. 5) displays the information on the parent task: description, attachments and documents.
Fig. 5. Task approval. "Parent Task" tab
Note, that when you select an approver, the system will create a separate approval task (fig. 6).
Fig. 6. Approval task
In this case, the parent task is marked with the icon, and the approval task is marked with the icon. While pending approval, the parent task has the "Pending Pre-Approval" status, and after approval - the "New" status.
After the approval, the parent task page (fig. 7) displays the approval result.