Static width for all columns

Hey Libre Members!

Do any of you people know how I can set a static width for all columns ?
They are all different sizes now. I want to columns always to have the same width in every document.

For new documents, you can create a template.

For already created documents, select all (Ctrl+A), and change the column width (menu Format - Columns - Width; or, move the line between two column headers).