Import Features allows you to annotate an unannotated or partially annotated sequence with annotations (or features) contained within a BED/GFF/GTF/GFF3 file.
The Sequence ID (SeqID) contained within all features in the file will be shown in a dialog along with the number of features for each SeqID and the region of the sequence that these will be annotated against. A warning will be displayed if any of the features are outside of the region to be annotated
A dialogue will be shown with the number of annotations that have been added. If you annotate a blank sequence (e.g. a fasta file) the resulting features may be initially hidden. However, you can easily show them from the Graphics Palette tree view.