The contig editor displays only one segment of the entire contig. Above the sequence display is a "scrollbar". This line represents the entire contig, with a greyed section representing the currently displayed segment. To change the displayed segment put the mouse cursor in the scrollbar and use the mouse buttons. The available controls are:
Middle Mouse Button Set displayed section Left Mouse Button Scroll left or right one screenful
Also holding down the middle button and moving the mouse cursor will scroll along the editor.
In addition to the scrollbar there are four buttons on the left hand side for scrolling by fixed amounts.
<< Scroll left half a screenful < Scroll left one base > Scroll right one base >> Scroll right half a screenful
Within the editor window itself two more key combinations can be used
for scrolling forwards and backwards an entire screenful. These, and
several others, are modelled after the Emacs key bindings.
Control v Scroll right one screenful Control v Scroll left one screenful
Finally, moving the editing cursor will always adjust the displayed section so that the editing cursor is visible. Hence this can also be used to scroll around the editor.