What action should be taken if preferred commands are not visible in the current NX layout?

When preferred commands are not visible in the current Siemens NX layout, activating different roles is an effective action because roles in NX determine the set of tools and commands that are displayed based on the selected task or area of work. Each role is tailored for specific functions—such as design, analysis, or manufacturing—and includes commands that are pertinent to those functions.

By switching to a different role, you can essentially load a different workspace configuration that may include the preferred commands you are looking for. This ensures that you have access to the appropriate tools required for your current project or workflow.

While restarting the application might resolve some issues or refresh the layout, it does not directly address the absence of specific commands tied to roles. Adjusting display settings may change how things are visually presented but will not necessarily add commands that are dependent on your selected role. Modifying part permissions is unrelated to the visibility of commands in the user interface, as it pertains to the access rights of certain features or data objects in the software.

Thus, activating different roles is the most effective and relevant action to restore visibility to preferred commands in your NX environment.