How-tos.md

@@ -291,7 +291,7 @@ If you changed values in the preview, its best to destroy each camera and restar
 	vT{i}.destroy
 ```
 
-When you have adjusted everything and are ready to start an experimental paradigm, you need to run the tracking and the paradigm in to different Matlab instances.
+When you have adjusted everything and are ready to start an experimental paradigm, you need to run the tracking and the paradigm in two different Matlab instances.
 
 **What are these files with the camera serial info and what do they do?**  
 - Camera configuration files (either [defaultCam_cfg](https://gitlab.ruhr-uni-bochum.de/ikn/OTBR/-/blob/Feature_CameraTracking/Tracking/defaultCam_cfg.mat) or serialNumber_cfg) :arrow_right: Configuration of ROI, brightness, blob values etc.