The following steps will allow you to take an existing .txt file and create a .brl file with contracted braille.
Step 1: Open the existing document.
Step 2: Change the file to .brl. To do this, open Settings by pressing Control + e. Next, move to document type by pressing n. Next, change to .brl by pressing Space. Finally, save your settings by pressing Enter.
Step 3: Copy the existing text.
Step 4: Open a new blank document.
Step 5: Paste the text into this document and save as a braille file.