Which button allows switching from display mode to change mode to edit an existing contract?

The option that allows users to switch from display mode to change mode for editing an existing contract is related to functionality that facilitates accessing and modifying information within a system. In many software applications, particularly those related to contract management or data entry, a dedicated button often indicates a transition to an editable state.

The 'Change Mode' option is specifically designed to enable users to switch from merely viewing details (display mode) to a state where they can make changes (change mode). This is a common feature in user interfaces, emphasizing clarity and user-friendliness when it comes to managing data.

In contrast, the other options do not directly imply the ability to switch modes for editing. For example, options like 'Edit History' and 'Correct History' may pertain to reviewing past changes or corrections rather than facilitating a current edit. 'Update Record,' while it sounds relevant, generally indicates committing changes rather than switching to edit mode. Thus, 'Change Mode' is the most appropriate choice for indicating the action of moving from a display context to one where modifications can be made to existing contracts.