The writing spacer has 3 parts:
It encourages appropriate letter sizing and spacing between words to improve legibility. The slider is moved along the top bar after each word while the ruler guides the mask down the length of the page keeping alignment.
No supports are needed to print and it should be placed on the bed as pictured.
The current sizing supports ruled paper or emerging writers who write using large letters. You may modify the sizing on slicer software for college ruled or smaller print. The slider may be set to 7mm wide and the width of the mask can also be adjusted as needed. I've had success with 35mm.
Lefties, I believe can rotate the setup with the ruler placed on the right side of the paper although I've not tested this out.
The author remixed this model.
This great tool for reading can also help students when writing by blocking out the height of the lines on the paper and the slider can serve as a reminder to put spaces between words.
Working off this original project, I changed the window opening size, modified the slider to be less wide, and created a dip for the finger to rest in. I also added a ruler and guide to help move the bar down the length of the paper without it shifting.