Alternative Names for 'Default' Button

I noticed that the current name "Default" might cause some confusion. In the past, it was referred to as 'Run' (which seems to have been an internal reference, as it was shown as just an icon), and it looks like it will now be updated to "Default." To make it clearer, I would like to suggest two possible alternative names:

• Run Simulation: This clearly describes the function of simulating the app's behavior.
• Full Preview: This gives the idea of previewing the entire app.

Do you have any other suggestions or thoughts? Do you think the name "Default" might be a bit confusing?