I have a timeline view that has quarter columns and is grouped by product category field. Within each product category group there are multiple ideas, some that span 1 quarter and some that span multiple quarters. The default view seems to create too many swim lanes (rows) within each product category section instead of collapsing them onto the same row if there is no overlap between idea time lines. This creates a lot of white space in the timeline view between rows.
To fix this, I can drag ideas up one or more rows to fill all the white space. This results in displaying the minimum number of rows to show all my ideas and reduces the amount of white space on the timeline. This works; however, if I navigate away and come back to the view, the row position of the ideas I manually dragged are not remembered and I need to do it all over again.
Any ideas or suggestions on how to resolve this problem to create a more compact timline view?