When the time is up, the screen shows no more choices.
the message is "your time to answer this question has expired":
In my opinion this is what you want the timer to do and what it is used for.
You see, there are three options
- Warn and move on
- Move on without warning
- Disable only
So the first two options disable the "next" button and proceed when time limit is up (with or without warning)
And the last option disables the "next" button and when time limit is up disable the answer options by hiding them.
Though I have no clue why you want the respondent to see a question for some time before he is allowed to proceed you may work around this by using a group.
Create a second question of type "text display" where you set the timer. Hide this question with css class "hidden".
If the reason is that there is a lot of text and you want to make sure the respondent reads it, put it into a preceeding "text display" question with timer.
And:
With this css "visibility:hidden" you still produce this change of the height of the question container.
Obvious: As soon as the time limit is up the two alerts are disdplayed, but their visibility is hidden, not he used space.