Editing duration

[D.K1]

is it possible to designate a time that can be subtracted from the duration of the designated session. Suppose the session lasted 2 hours and I want to subtract 10 minutes. Can I do it using the time picker, for example?

[ABG]

The time picker has very few blocks for time math.

Use the Clock component, and its SystemTime block to get current milliseconds from 1970.
Do some arithmetic with it to get deadlines you can check in a Clock Timer event.

[TIMAI2]

Something like this:

[Anke]

Or this:

[D.K1]

Thank you for your help. Both methods helped me understand this.