The PatchSize controls within the LightSpace Network Manager can be used to set any specific patch size and position for display profiling.
The values are normalised 0-1 values, represented in percentage terms, with the 'xy' boxes setting the position of the Top Left corner of the patch window, and the 'WH' boxes setting the Width and Height of the patch window, again in normalised percentage terms.
Using these percentage terms it is a simple process to calculate the required values for any given patch size and position, be it a percentage of screen width/height, or screen area.
As screen area is the common requirement for setting patch size (and as screen width/height is a very simple procedure), the following explains how to calculate the values for screen area patch size/position.
The 'xy' values to centralise the patch window can now be calculated by simply subtracting half the patch size from half the screen size.
Therefore the final figures to be entered into the Network Manager are: 34,34,32,32.
Using the above, a centralised 12% patch window would be 33,33,35,35, and a 22% patch window 27,27,47,47.
Some LightSpace Connect devices (such as Chromecast) may need rescaling for TV Legal ranges when profiling. This can be performed using the 'Active LUT' function within LightSpace to re-scale the colour patches correctly using a 64-940 rescaling LUT, either made via the 'Edit/LUT Manipulation/Append/1023->64-940' function, or through use of the 'LUT Image' for external LUT manipulation, applied to a bypass LUT made via 'File/New'.
Note: To gauge if a rescaling is needed use the 'Calibration Interface' menu, and use the 'Patch Colour' function to toggle the IS-mini patch output colour between the Black patch  and Grey . If there is NO visible or measurable difference between the two patches a rescaling will be required as the output signal is being clipped.