title: Cant calibrate touchscreen on kivy
body: <p>For my pi touchscreen project I am working with an -you guessed it- pi and an egalax touchdriver. The thing receives input and the touchscreen actually works, after some minor tweaking like inverting y_axis and stuff. However, at this moment I'm stuck trying to touch a certain button on the edge of the screen which I can't reach. I actually use a pen with the cursor enabled to make sure I know where the screen registers my input. </p>
  
  <p>So after searching a bit in the kivy documents I came across <a href="https://kivy.org/docs/api-kivy.input.postproc.calibration.html" rel="nofollow noreferrer">this postproc.calibration</a> module which should do the trick. </p>
  
  <p>But it doesn't. I tried putting the following 2 code snippets in the <code>.kivy/config.ini</code> file:</p>
  
  <pre><code>[input]
  egalax = hidinput,/dev/input/event0,rotation=90,invert_y=1
  
  [postproc:calibration]
  egalax = xratio=1.2,yratio=1.2
  </code></pre>
  
  <p>The <code>[input]</code> bit works, no problems there. the <code>[postproc:calibration]</code> bit is what doesn't work. I've tried putting the line above the <code>[postproc]</code> module, beneath it, even beneath the <code>[modules]</code> module. Also I've tried putting the <code>egalax = xratio=1.2,yratio=1.2</code> line IN the <code>[postproc]</code> module. Didn't seem to work. I've also tried to increase the floats to 2.0, but no changes.</p>
  
  <p>So how would I 'expand' my area of touch input?</p>