Can we modify or edit the Transition view screen buttons manually or using a add on ?

[Naveen kumar]

Please suggest ? if there's any free add ons available please suggest ? 

[Nic Brough -Adaptavist-]

The transition buttons are created by the workflow, and can be edited in there.

The words on each button is literally the name of the transtion in the workflow.  Whether a button appears or not is dependent on the transition being there AND passing conditions (like user is in group x, or date field is over 7 days ago)

I'm assuming that's what you mean by "modify or edit transition view" - please correct me if that is the wrong guess?