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.. _textComponent:
Text Component
-------------------------------
This component can be used to present text to the participant, either instructions or stimuli.
name : string
Everything in a |PsychoPy| experiment needs a unique name. The name should contain only letters, numbers and underscores (no punctuation marks or spaces).
start :
The time that the stimulus should first appear. See :ref:`startStop` for details.
stop :
The duration for which the stimulus is presented. See :ref:`startStop` for details.
text : string
Text to be shown
Appearance
==========
How should the stimulus look? Colour, borders, etc.
foreground color :
See :ref:`colorspaces`
foreground color space : rgb, dkl or lms
See :ref:`colorspaces`
opacity :
Vary the transparency, from 0.0 = invisible to 1.0 = opaque
Layout
======
How should the stimulus be laid out? Padding, margins, size, position, etc.
flip :
Whether to mirror-reverse the text: 'horiz' for left-right mirroring, 'vert' for up-down mirroring.
The flip can be set dynamically on a per-frame basis by using a variable, e.g., $mirror, as defined in a code component or conditions file and set to either 'horiz' or 'vert'.
ori : degrees
The orientation of the stimulus in degrees.
pos : [X,Y]
The position of the centre of the stimulus, in the units specified by the stimulus or window
spatial units : deg, cm, pix, norm, or inherit from window
See :doc:`../../general/units`
wrap width : code
How many characters in should text be wrapped at?
Formatting
==========
Formatting text
font : string
What font should the text be set in? Must be the name of a font installed on your computer
language style : LTR, RTL, Arabic
Should text be laid out from left to right (LTR), from right to left (RTL), or laid out like Arabic script?
letter height : integer or float
The height of the characters in the given units of the stimulus/window. Note that nearly all actual letters will occupy a smaller space than this, depending on font, character, presence of accents etc. The width of the letters is determined by the aspect ratio of the font.
.. seealso::
API reference for :class:`~psychopy.visual.TextStim`
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