Activities/Ruler

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Ruler.png

Where to get Ruler

Activity | Source

About Ruler

Ruler-icon.png

Ruler is a simple collection of measurement tools that are displayed on the screen.

Since the OLPC XO computer has a 200 DPI display, the rulers are quite accurate. One other hardware, where the display resolution is not known, their is a spinner to let the user set the DPI. Ruler saves this value to the Journal, so it need not be set on subsequent uses of the Activity.


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