How to Add/Remove Button in Manufacturing Operation Task using Workflows

I want operators to be able to select a current Manufacturing Operation Task from a Dashboard/saved search and then press the Enter Completion or Enter Completion with Back Flush depending on the operation. Enter Completion With backflush on operation 10 and Enter Completion on all other operations (better still with backflush on any operation with BOM items assigned).

When I try and Remove/Add button on a Manufacturing Operation Task using a Workflow the button option is not available. Is there a way to expose this. I can control the visibility on WO but I am wanting the operator to go directly to the task so they do not need to select a start/end operation, just press the Enter Completion button, enter quantity and potentially update actual run/setup time.