Creating and modifying Tables
Unicode Viewer lets you modify the visible Unicode table and export it to text files.
Choosing and combining Blocks
To create your own table, you will most likely start by selecting one or multiple blocks in the Blocklist using
Shift+click and Ctrl+click. It is also possible to create new blocks, using the "New Block" button in the
toolbar: 
It will bring up a dialog that lets you define a new block by its name and the lowest and highest codepoint in the block.
Removing letters from the Table
Once the Tableview contains at least all the letters, you want in your new table, you can continue by removing some of them.
To do this, select the letters to remove and then press the "Remove selected Items" button in the toolbar:

It is also possible to remove all letters that are not selected, with the "Reduce Table on selected Items" button:

If you want to start over, you can clear the table and remove all letters from it with the Clear function:

Notice: It is possible to directly show a range of letters or letters with a common attribute in the Tableview using the
Console and the Search functions. Please refer to Using Search and
Using the Console to learn more.
Exporting your Table
When you are satisfied with the table in the Tableview and want to export it to a text file similar to "allkeys.txt",
use the "Export Unicode Table" function in the toolbar (
)
or in the File menu.