Trace window. The lines in each panel above the trace chromatogram indicate the following: (con) consensus position; (rd) read position; (con) consensus bases; (edt) editable read bases; (phd) phredbase calls; and (ABI) ABI base calls. The H and V scale bars change the horizontal and vertical magnification of the traces. (Scroll together Yes/No buttons) Allows the user to scroll the traces individually or locked together. (Remove) Removes this trace panel from the window. (Undo) Undo the last edit operation on that read.