From Test-Scratch-Wiki

Second person is a point of view in the English language consisting of the word "you". It is used when the author of a piece of writing is talking directly to the reader. It addresses the reader directly. Second person is not allowed in articles except how to pages according to the Scratch Wiki editing conventions. An example of a second person sentence is below:

You can click on the color palette to select a color.

This would not be proper for a normal Wiki article because it contains the word "you". It detracts from the content of the article by bringing the focus onto the reader instead. A better way of wording this would be:

Clicking on the color palette allows one to select a color.
By clicking on the color palette a new color can be chosen.
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