My first few designs used the charting style I learned from Mirriam Felton in her Craftsy class for lace shawl design. For a triangular shawl, it incorporates the center and edge stitches into the chart and indicates a repeat for the two sides of the shawl. I've found it's confusing for many people so more recently I've been using a format for triangular shawls in which the center and side stitches are only in the written directions and the chart is only the side panel.
Recently, I had an email conversation with someone who was having trouble with the Vefr charts. I made this video to help the knitter to read the existing charts. Here it is for others who might find it useful as well.