dear aspirant,

Yes, you surely can. After any round, you get a three-day period to report at a reporting centre to choose your option for next rounds. First, go to JoSAA’s official website, click on the ‘Document Formats’ in the list on the left side of the screen. And find the format for ‘Change of option for further rounds’.If you wish to continue with the option ( float/slide) provided by you in the first round, you are not required to report and you will continue with the same option for subsequent rounds.

hope it helped.