Perfect, thanks for the info @MartinLubell!
The easiest way to manually order the taxa bar plots is to add an new Metadata Column to your metadata file, and specify your sort order there. For example, say I have samples s1, s2, s3, and s4, but wanted to view them in the following order: s3, s1, s4, s2, I could make a sample metadata file that looks like this:
#SampleID CustomSort ... other metadata columns ...
s1 2
s2 4
s3 1
s4 3
Then, use this metadata file when running taxa barplot. In the viz, add a sort rule based on that metadata column. This approach has the advantage of being reusable across visualizations and methods.
A real-world example using the Moving Pictures Tutorial.
Reordering the first few samples. Original sort: L1S8, L1S57, L1S76, L1S105. New sort: L1S57, L1S8, L1S105, L1S76.
I didn't put in CustomSort values for any of the other samples, so I did a secondary order by the original sample id.
Hope that helps, and keep us posted with any questions! 