ZoomIn Command

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ZoomIn( <Scale Factor> )
Zooms the Menu view graphics.svg Graphics View in by given factor with respect to current zoom, center of the screen is used as center point for the zoom.
Example:
ZoomIn(1) doesn't change the view, but does remove traces
ZoomIn(2) zooms the view in
ZoomIn(0.5) is equivalent to ZoomOut(2), i.e. it zooms the view out.
ZoomIn( <Scale Factor>, <Center Point> )
Zooms the Menu view graphics.svg Graphics View in by given factor with respect to current zoom, second parameter specifies center point for the zoom.
Example:
ZoomIn(2, (0, 0))
ZoomIn( <Min x>, <Min y>, <Max x>, <Max y> )
Zooms the graphics view to the rectangle given by vertices (Min x, Min y), (Max x, Max y).
Example:
ZoomIn(0, 1, 5, 6)
Note: If any of these parameters are dependent or has label set, the bounds of the view become dynamic. To avoid this behaviour, use CopyFreeObject Command.
Example:
If a is a slider, ZoomIn(-a, -a, a, a) makes the zoom of the view dependent on slider a.
Notes:

Comments

Idea of Use[edit]

Linear aproximation of a function by its tangent[edit]

Create a function f with a point A on it and a button with the code ZoomIn(2,A) to see that the function looks equal to the tangent for a big "magnification". Another button with ZoomOut let you be able to prove this at other positions of the point A.

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