The default composition length is 100 bars. It would be nice to have Rosegarden automatically extend the composition length when reaching the end of the current length. For example, when I copied and pasted a segment, the pasted segment was simply truncated at 100 bars until I set a new composition length. If Rosegarden instead would simply extend the composition length to accommodate new pasted segments and extend the composition length when recording new segments, this would make composing slightly less cumbersome.