What is the best way to correct mistakenly assigning a consecutive string of chords with 8th note value to 1/4 note value?

Is there an easy way to correct this aside from not making a mistake in the first place? What I have tried:

Select the notes of one of the chords using a command click and then copy using command c. I tried to command V the chord into a new bar to then be able to change it without making the next chord disappear but didn't work. In Kawai Touch notation for the IPad, I could just change the note values and the app actually accepts there being too many notes in the bar but then one can copy and paste the chords into the next bar.

Thanks
Brian