Final answer:
The volume control icon reflects the current overall volume level and doesn't provide a history of volume levels, so the answer to whether it shows all volume up to the current minute when opened is True.
Step-by-step explanation:
When considering a volume control feature on a digital platform, the question asks whether opening the volume control at any given time shows all the volume changes up to the current minute. The answer is True. Typically, volume controls on most platforms are designed to reflect the current volume level rather than showing a history of volume levels. Therefore, if you were to open the volume control icon at any given time, it would indicate the current overall volume level of the system or application, not a historical volume level.