An additional file is generated by this tool, which is hidden from the history list. You can view these outputs by clicking on the cogwheel next to the "History Panel" and select "Include Hidden Dataset".
FastTree infers approximately-maximum-likelihood phylogenetic trees from alignments of nucleotide or protein sequences. FastTree can handle alignments with up to a million of sequences in a reasonable amount of time and memory. For large alignments, FastTree is 100-1,000 times faster than PhyML 3.0 or RAxML 7. FastTree is open-source software.
This tool produces two output files, one of which is hidden by default (the log file).
You can view the hidden output by clicking on the cog wheel next to the History panel and select "Include Hidden Dataset".
The placement of the root is not biologically meaningful. The local support values are given as names for the internal nodes, and range from 0 to 1, not from 0 to 100 or 0 to 1,000. If all sequences are unique, then the tree will be fully resolved (the root will have three children and other internal nodes will have two children). If there are multiple sequences that are identical to each other, then there will be a multifurcation. Also, there are no support values for the parent nodes of redundant sequences.