Question

In some measures, when there is more than one chord for a single measure, the chord names overlapped one another - is it possible to make the measure longer so the chord names fit ?

Answer 1

If you are using Notion 6 on a desktop, you can go to View>Show Layout Handles, and then drag the small boxes that appear to adjust your measure length.  You can also click and drag your chord symbols into the desired location.

If you are using Notion for iOS, it is not possible to adjust the measure length or chords at this time.