The most obvious on-screen "object" corresponding to a grafport is a window, though so is the entire desktop view and off-screen ports can also exist.

Zen Bound offers an immersive experience where users interact directly with three-dimensional on-screen objects.

The suite of touch controls built into Zen Bound provide almost intuitive control over the on-screen objects.

Instead, the player is forced to draw connections between keywords and on-screen objects.

Multi-touch capabilities, which can recognize multiple simultaneous finger touches, allowing for enhanced manipulation of on-screen objects.

Technologically, the series pioneered the use of animation and pseudo-3D environments in graphic adventure games, so that the main character could, for example, walk behind objects on-screen.

Weiss further commented that the control scheme was unique for its time, and that the number of on-screen objects moving smoothly was impressive.

A custom graphics coprocessor-which operates as a blitter chip-generates the on-screen objects and visual effects.

The switch allowed them to display more on-screen objects at a lower cost.

For on-screen moving objects larger than one sprite's extent, sprites may sometimes be scaled and/or combined.