Initializing help system before first use

# svgaddarrow

Purpose
Add an arrow to an object group.
Synopsis
`procedure svgaddarrow(gid: string, x1: real, y1: real, x2: real, y2: real)`
`procedure svgaddarrow(x1: real, y1: real, x2: real, y2: real)`
Arguments

gid | Object group ID.
x1 | The x coordinate of the first point.
y1 | The y coordinate of the first point.
x2 | The x coordinate of the second point.
y2 | The y coordinate of the second point.

Example
The following adds two arrows to a group named `thetime'. The arrows suggest three o'clock:

    svgaddgroup("arrows", "thetime", SVG_BLACK)
    svgaddarrow("arrows", 0, 0, 0, 5)
    svgaddarrow(0, 0, 4.5, 0)
    svgsetgraphviewbox(-5, -6, 10, 12)

Further information
1. The arrow connects the two points whose coordinates are given as parameters, pointing to the second one.
2. If no group ID is specified, the arrow is added to the last group that has been created.
Parent Topic Procedures and Functions

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