Adjust the Blinds to the Appropriate Length
The process of shortening the blinds is easy if you follow the instructions and diagrams that come with the blinds. Drop the blinds as far as they will go — so that the bottom rests on the windowsill to determine the appropriate length.
Remove the plastic retaining tabs from the bottom piece for adjusting the length (Image 1).
Next, slide out the larger bottom piece and cut the strings to the proper length.
Remove the excess slats and discard them (Image 2).
Replace the bottom piece into the last rung (Image 3).
The string ends are tied and pushed into holes under the last rung.