Each bar (cell or measure) in BIAB can contain up to 4 chords (4 beats per bar). Just click on the first half of the cell and type C7,D7 then hit tab and enter Fmaj,GMaj. There are your four chords in the one cell (measure). Any thing less just eliminate the chord entry. Is this what you are looking for?

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BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6