hiding sequences that have just been revealed reorders hidden sequences

The subtlety rating high on this one....

1. Import this alignment:
>a
AAAAAAA
>a
AAAAAAA
>s
SSSSSSS
>b
AAAAAAA
>b
AAAAAAA
>s1
SSSSSSS
>c
AAAAAAA
>c
AAAAAAA
>s2
SSSSSSS
>d
AAAAAAA
>d
AAAAAAA

2. Select each 's' sequence in turn and press H to hide it. You should have the four sets of sequences shown with three blue triangles between each set.

3. reveal the middle hidden sequence by right-clicking and selecting 'Reveal Sequences'.

4. Press H (or right click and hit 'hide sequences' on selected set). Notice now that the lowest triangle now lies *between* the two 'c' sequences, rather than between the c and d set.

5. Press H again - s,s1,s2 revealed in place - s2 has been relocated to between the c sequences.


This can also result in groups of sequences being merged.

1. Reload same example alignment.

2. Select and hide in turn both b sequences, then both c sequences. Two hidden triangle markers are shown separated by s1.

3. Reveal the b sequences. Hide them again.

Now there is only one hidden triangle - the b and c sequence hidden sets have been merged.