You can hide bar-lines from the inspector (MUS4 properties - Appearance).
But you will still have invisible boundries between bars. If you want notes values to span across bars set checkmark in Format->Style->Score at "Display note values acros bar boundries"
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See https://musescore.org/en/handbook/4/pickup-and-non-metered-measures
You can hide bar-lines from the inspector (MUS4 properties - Appearance).
But you will still have invisible boundries between bars. If you want notes values to span across bars set checkmark in Format->Style->Score at "Display note values acros bar boundries"