  Virtual Reality (VR) has the potential to support mobile knowledge workers by
complementing traditional input devices with a large three-dimensional output
space and spatial input. Previous research on supporting VR knowledge work
explored domains such as text entry using physical keyboards and spreadsheet
interaction using combined pen and touch input. Inspired by such work, this
paper probes the VR design space for authoring presentations in mobile
settings. We propose PoVRPoint -- a set of tools coupling pen- and touch-based
editing of presentations on mobile devices, such as tablets, with the
interaction capabilities afforded by VR. We study the utility of extended
display space to, for example, assist users in identifying target slides,
supporting spatial manipulation of objects on a slide, creating animations, and
facilitating arrangements of multiple, possibly occluded, shapes. Among other
things, our results indicate that 1) the wide field of view afforded by VR
results in significantly faster target slide identification times compared to a
tablet-only interface for visually salient targets; and 2) the
three-dimensional view in VR enables significantly faster object reordering in
the presence of occlusion compared to two baseline interfaces. A user study
further confirmed that the interaction techniques were found to be usable and
enjoyable.
