Setting an animation interval

[TheOnionRing]

After I imported my spreadsheet and tried to run, I always got the pop-up "Cannot animate timeline without an animation interval.Set one before clicking play button." However, I have already specified the intervals as I put in the spreadsheet.
Here's my spreadsheet.
Source Target Type Id timeset Weight
1 2 Undirected 1 <[0,10],[10,20],[20,30]> <[0,10, 5],[10,20,25],[20,30,50]>
1 3 Undirected 2 <[0,10],[10,20],[20,30]> <[0,10, 25],[10,20, 10],[20,30,10]>
1 4 Undirected 3 <[0,10],[10,20],[20,30]> <[0,10, 5],[10,20,5],[20,30,0]>
2 4 Undirected 4 <[0,10],[10,20],[20,30]> <[0,10, 10],[10,20,15],[20,30,10]>
I don't know what exactly it means by setting an animation interval. Is it not the ones that I have put in the spreadsheet?
Appreciate for your help. Thank you in advance!

[eduramiba]

Hi, to hit play you need to reduce the timeline width to a smaller window than the full range, that's what enables the filtering.

[TheOnionRing]

I'm not quite sure how to reduce the timeline width to a smaller window. I just started using Gephi a few days ago sit's still pretty new to me. Sorry for asking about some steps that seem simple.
///
I just got it to work! Thank you!!!