[dj]

Hi, Lord Elpus:

The problem you're running into is that changing the length of either note necessarily inserts a rest into the space between the two notes.

For instance, changing the first note to a semi-quaver (16th) inserts a 16th note rest between the two. In Composer (Mark Walsen having been a "traditional" notation fiend), you're not supposed to beam over a rest.

However, sliding the second quaver left (shift-left-arrow) and extending its length to a dotted quaver (1. or 1d) will automatically beam the two notes again.

Is that what you were asking about?

David