How to rename the stalling / hold timers in the scoreboard

You can set the name of the stalling / hold timer from the scoreboard settings. The settings are accessed, either directly when creating the bracket, or editing an existing one.

When creating the bracket

From the registrations view, select a group and click "Create bracket".

Editing an existing bracket

Visit the bracket in question, and click the blue 'Edit' button in the right corner.