A theoretical line (physically or mentally) followed from a point of origin or towards a destination. May be relative (e.g. up, left, outbound, dorsal), geographical (e.g. north), rotational (e.g. clockwise), or with respect to an object or location (e.g. toward Boston).
Guidance, instruction.
A general trend for future action.
The work of the director in cinema or theater; the skill of directing a film, play etc.
A typically rectangular region representing the range or area currently visible (within a window, screen, etc.).
A viewing window.
To clip (an image or region) so that it fits in a viewport.