What aspect of the presentation process is indicated by the timecard?

The timecard serves a critical function in managing the flow of a presentation by indicating the duration left in the presentation. This tool helps presenters and participants keep track of time, ensuring that the content is delivered within the allotted time frame. By showing how much time is remaining, it allows presenters to gauge their pacing and adjust their delivery accordingly, which is vital for maintaining audience engagement and adhering to schedule constraints.

The other options do not align with the main purpose of a timecard. For instance, while the start time of the event is important for initiation, it is not what the timecard displays. Similarly, score updates and evaluation criteria pertain to assessment rather than the timing of the presentation. Thus, the primary role of the timecard is to communicate the duration left, helping presenters finish their talks effectively and efficiently.