PPT Slide

PARC Legacy:

1) the global visual metaphor -

critical in the user’s ability to understand the system

3) Overlapping windows -

easy to see what’s running and shift between them (efficiently implemented, rectangles are easy to draw, detect, etc)

2) modes are bad :

a state into which a program enters that change the affects of the user’s action from the normal affect

4) tiling - divide screen up into uniformly sized rectangles (Windows 1.0)

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