plmtex: Write text relative to viewport boundaries

The PLplot Plotting Library: Programmer's Reference Manual
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### `plmtex`: Write text relative to viewport boundaries

`plmtex` (side, disp, pos, just, text);

Writes text at a specified position relative to the viewport boundaries. Text may be written inside or outside the viewport, but is clipped at the subpage boundaries. The reference point of a string lies along a line passing through the string at half the height of a capital letter. The position of the reference point along this line is determined by ``just``, and the position of the reference point relative to the viewport is set by ``disp`` and ``pos``.

`side` (`const char *`, input) Specifies the side of the viewport along which the text is to be written. The string must be one of: `b`: Bottom of viewport, text written parallel to edge. `bv`: Bottom of viewport, text written at right angles to edge. `l`: Left of viewport, text written parallel to edge. `lv`: Left of viewport, text written at right angles to edge. `r`: Right of viewport, text written parallel to edge. `rv`: Right of viewport, text written at right angles to edge. `t`: Top of viewport, text written parallel to edge. `tv`: Top of viewport, text written at right angles to edge. `disp` (`PLFLT`, input) Position of the reference point of string, measured outwards from the specified viewport edge in units of the current character height. Use negative ``disp`` to write within the viewport. `pos` (`PLFLT`, input) Position of the reference point of string along the specified edge, expressed as a fraction of the length of the edge. `just` (`PLFLT`, input) Specifies the position of the string relative to its reference point. If ``just`=0`, the reference point is at the left and if ``just`=1`, it is at the right of the string. Other values of ``just`` give intermediate justifications. `text` (`const char *`, input) The string to be written out.

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